bluuebunny/crossref_metadata_2025_split huggingface dataset:
Antiovulatory Potency and Conformation of an Antagonist of the Luteinizing Hormone-Releasing Hormone Having Six D-Amino Acids
Authors: Folkers Karl , Bowers Cyril Y. , Momany Frank , Friebel Klaus J. , Kubiak Teresa , Mahera Joseph 
Published: February 2015

Abstract
[N-Ac-Thr 1 ,D-Phe 2,D-Trp 3,6]-LHRH was the model antagonist of LHRH, which was the basis for tho design, synthesis and bioassay of seven peptides having four, five and six D-amino acids, which resulted from three single, three double, and one triple introductions of D-amino acids in positions 4, 5 and 8 of the model. Only the analog with six D-amino acids, [N-Ac-Thr 1,D-Phe 2 ,D-Trp 3,D-Ser 4, D-Tyr 5 ,D-Trp 6 ,D-Arg 8]-LHRH, had antiovulatory activity which was higher than that of the model antagonist, i.e., 70% antiovulatory activity at 25 μg/rat compared with 50% activity at 50 μg/rat, respectively. Empirical energy calculations gave a conformational structure for [N-Ac-Thr 1,D-Phe 2,D-Trp 3, D-Ser 4,D-Tyr 5,D-Arg 6,D-Arg 8]-LHRH which is similar to that calculated for previous potent antagonists. These results are a basis of new designs of antagonists having D-sub-stituents in up to ten positions toward effective inhibitors of ovulation by the parenteral and oral routes of administration.
2-Phenylthiazol-Derivate aus Pseudomonas cepacia / 2-Phenylthiazole Derivatives from Pseudomonas cepacia
Authors: Bukovits G. J. , Mohr N. , Budzikiewicz H. 
Published: February 2015

Abstract
From the culture medium of Pseudomonas cepacia 2-(o-hydroxyphenyl)-thiazol and its 4-carbaldehyd and 4-carboxylic acid derivatives (aeruginoic acid) could be isolated. Their structures were elucidated and confirmed by synthesis.
Umwandlung von 5H-Dibenz[c.e]azepinen in Phenanthridine über cyclische N-Diazonium-Ionen / Conversion of 5H-Dibenzo[c,e]azepines into Phenanthridines via Cyclic N-Diazonium Ions
Authors: Kreher Richard , Bergmann Udo 
Published: February 2015

Abstract
The reaction of 6-amino-6,7-dihydro-5H-dibenzo[c,e]azepine, bearing a terminal blocking group, with trifluoracetylnitrite presumably proceeds via cyclic 7-membered N-diazonium ions and mainly leads to the formation of phenanthridine by migration of the aryl group. 5H-Dibenzo[c,e]azepine can be isolated as the minor product and seems to be the result of a hydrogen shift. N ,N′-Azo-6,7-dihydro-5H-dibenzo[c,e]azepine dis-plays an analogous behaviour.
Funktionelle Derivate von Phenoxyplienoxypropionsäuren und ihre herbizide Wirksamkeit / Derivatives of Phenoxyphenoxypropionic Acids and their Herbicidal Activity
Authors: Handte Reinhard , Koch Manfred , Bieringer Hermann , Hörlein Gerhard 
Published: February 2015

Abstract
Derivates of phenoxyphenoxypropionic Acids are herbicids with high activity. Methods to synthesis these compounds are reviewed. Relationship between structure and herbicidal activity are discussed.
Notizen: Die Kristallstruktur von Hexametliylentetrammoniumtrichloromercurat (II), [C6H13N4] [HgCl3}] / The Crystal Structure of Hexamethylenetetrammoniumtrichloromercurate( II), [C6H12N4][HgCl3]
Authors: Pickardt Joachim , Schendler Thomas 
Published: February 2015

Abstract
By the react ion of mercuric chloride and hexamethylenetetramine in aqueous solution crystals of the title compound could be obtained. The compound contains planar trichloromercurate (II) anions; in the crystal they form infinite chains, interlinked by chloride bridges.
Crystal Structure of Tetrakis(triphenylstibine)gold(I) Bis (pentafluorophenyl) aurate ( I )
Authors: Jones Peter G. 
Published: February 2015

Abstract
The crystal structure of the title compound has been determined (P3c 1, a = 2161.5(3), c = 2859.8(4) pm, Z = 6; Rw = 0.07 for 2217 observed reflections). There are three independent (Ph3Sb)4Au+ cations, each with one Au-Sb bond directed along a crystallo-graphic threefold axis. Deviations from ideal tetrahedral coordination are small (max. 8 pm, 1°).
Darstellung und Kristallstruktur von Gold(III)selenitchlorid, Au(SeO3)Cl/Preparation and Crystal Structure of Gold(III) Selenite Chloride, Au(SeO3)Cl
Authors: Jones Peter G. , Kraushaar Martin , Schwarzmann Einhard , Sheldrick George M. 
Published: February 2015

Abstract
Au(SeO3)Cl was prepared in a sealed-tube synthesis from Au2Se4O11, selenic acid and perchloric acid. The crystal structure was determined (P1̄, a = 418.5(1), b = 975.6(4), c = 1060.8(5) pm, α = 80.57(2), β = 88.85(2), γ = 87.66(2)°, Z = 4, R = 0.06 for 2273 observed reflections). There are three independent gold atoms in the structure, belonging to AuO4, AuO2Cl2 and AuO3Cl units respectively. The oxygen atoms bridge Au and Se, leading to a polymeric layer structure.
Ylid-Komplexe von Alkali- und Erdalkalimetallen, VI [1] Neutrale und anionische Ferrocenylmethylide und Fluorenylide/Ylide Complexes of Alkali and Earth Alkaline Metals, VI [1] Neutral and Anionic Ferrocenylmethylides and Fluorenylides
Authors: Schmidbaur Hubert , Deschler Ulrich , Seyferth Dietmar 
Published: February 2015

Abstract
Coordination properties of phosphorus ylides towards electropositive metals are greatly improved in systems, where the carbanionic charge can be delocalized into the aromatic rings of substituents, as illustrated in the title compounds. The ferrocenyl-substituted ylide 2, synthesized from bis(diphenylphosphino)methane and (ferrocenyl)trimethyl-ammonium iodide via the phosphonium salt intermediate 1, is thus easily converted into the alkali complexes 3 a, b on treatment with NaNH2 or KH in tetrahydrofuran, respectively. The intensely coloured products are soluble in a number of organic solvents. NMR spectra of these solutions provide evidence for an interaction between alkali cations and the ferrocenyl rings. - From (C6H5)2CH2P(C6H5)2 and ferrocenylmethyl chloride a di-quaternary salt 4 is obtained, which yields a double-ylide mixture 5 a, b on treatment with base. Hydrolysis of this product affords the ylidic phosphine oxide 6. - The reaction of the ylides 7 and 9 (described previously) with NaNH2, KH or barium metal (in liquid ammonia) leads to the (earth) alkali complexes 8a-c and 10a, b, respectively. With the exception of 8c, but similar to 3a, these materials contain tetrahydrofuran solvate molecules. The 23Na NMR spectrum of 8a and the pronounced quadrupole broadening of the P(III) signals by the alkali cations in the 31P NMR spectra of 8 a, b allow structural suggestions for the solution state as proposed in the formulae. Further treatment of 10b with KH yields a potassium complex 11, characterized, i.a., via a corresponding diquaternary salt 12.
Kohlensäureesterphosphide – Synthese und Cyclisierungsreaktionen/Carbonic Ester Phosphides – Synthesis and Cyclization Reactions
Authors: Thamm Rüdiger , Fluck Ekkehard 
Published: February 2015

Abstract
Carbonic ester phosphides, RPHCOORʹ and RP(COORʹ)2, have been prepared by the reaction of ClCOORʹ with primary phosphines RPH2 in the presence of K2CO3. Some compounds of RPHCOORʹ series are transformed into P-heterocycles through addition of the P-H group to the C = C doublebond systems. The 31P NMR data, IR and mass spectra of the novel compounds are presented and discussed.
Isopoly- und Heteropoly-Thioanionen. Kristall- und Molekülstrukturen von (PPh4)2[(WS4)WS(WS4)],CS2[(WS4)WO(WS4)H2O]·2H2O und (AsPh4)2[(WS4)Ni(WS4)]/Isopoly- and Heteropoly-Thioanions. Crystal and Molecular Structures of (PPh4)2[(WS4)WS(WS4)], Cs2[(WS4)WO(WS4)H2O] · 2 H2O and (AsPh4)2[(WS4)Ni(WS4)]
Authors: Müller Achim , Bögge Hartmut , Krickemeyer Erich , Henkel Gerald , Krebs Bernt 
Published: February 2015

The crystal and molecular structures of (PPh4)2[(WS4)WS(WS4)] (1a) and CS2[(WS4)WO(WS4)H2O] · 2 H2O (2a), which contain the first reported isopoly-thioanion of a transition metal have been determined:
1a: (P1̅, a = 913.0(1), b = 1060.1(2), c = 1333.9(2) pm, α = 87.11(1), β = 85.18(1), γ = 83.07(1)°, V = 1277.6 · 106 pm3, Z = 1);
2a: (P21/n, a = 671.6(2), b = 2018.5(4), c = 714.4(2) pm, β = 101.42(2)°, V = 949,3 · 106 pm3, Z = 2)
and compared with that of the trimetallic heteropoly-thioanion of
(AsPh4)2[(WS4)Ni(WS4)] (3a).
3a: (P1̄, a = 1255.2(3), b = 1277.1(3), c = 939.0(2) pm, α = 113.19(2), β = 96.28(2), γ = 108.72(2)°, V = 1261.5 · 106 pm3, Z = 1).
Though there are delocalized orbitals in the isopoly-thioanions they can be regarded as coordination compounds of WIVX2+ containing two WVIS4
2- ligands.
Borkomplexe mit Dicarbonsäuren: Bis(oxalato)borate und Bis(malonato)borate/Boron Complexes with Dicarboxylic Acids: Bis(oxalato)borates and Bis(malonato)borates
Authors: Bessler Eberhard , Weidlein Johann 
Published: February 2015

Abstract
Several bis(oxalato)borates and bis(malonato)borates have been prepared in heterogeneous reaction from boric acid, dicarboxylic acid and dicarboxylic salt by refluxing in benzene under continuous separation of water. The compounds were characterized by their IR and 11B NMR spectra. The vibrational spectra of the bis(oxalato)borate are discussed in detail.
IR-Spektren von Platin(II)-Komplexen mit Glycin, Glycin-und Glycylglycinethylester [1]/IR-Spectra of Platinum(ll) Complexes with Glycine, Glycine Ethyl Ester and Glycylglycine Ethyl Ester [1]
Authors: Kharitonov Jurij Ja. , Bissinger Herbert , Ambach Eberhard , Beck Wolfgang 
Published: February 2015

Abstract
The infrared spectra (200-4000 cm-1) of trans- and cis-Pt(NX2CH2COO)2 (X = H, D), trans- and cis-PtCl2(NH2CH2COOH)2, trans-PtCl2(NH2CH2CO2Et)2, cis-PtCl2(NX2CH2CO2Et)2, cis-PtCl2(NX2CH2NXCH2CO2Et)2 (X = H, D) and cis-PtY2(NH2CH2NHCH2CO2Et)2 (Y = Br, I) including 15N derivatives have been studied. There is no appreciable change of vibrational frequencies for corresponding cis- and trans- complexes which could be attributed to the trans-influence of different ligands. Due to lower symmetry most of the absorptions of the cis-complexes are split into doublets compared with the trans-compounds.
Metallkomplexe funktioneller Isoeyanide, VI [1] Tosylmethyl-, Benzyl- und Benzhydrylisocyanid-Metallverbindungen und ihre Reaktionen mit Nucleophilen und 1.3-Dipolarophilen/Metal Complexes of Functional Isocyanides, VI [1] Tosylmethyl-, Benzyl- and Benzhydrylisocyanide Metal Complexes and Their Reactions with Nucleophiles and 1,3-Dipolarophiles
Authors: Fehlhammer Wolf Peter , Bartel Klaus , Völkl Alfons , Achatz Dagobert 
Published: February 2015

Abstract
Metal complexes of the type M(CO)5L (M = Cr, W), MX2L2 (M = Pd, Pt; X = Cl, Br, I), PtCl2(L)PPh3, and [Pt(Cl)(L)(PPh3)2]BF4 have been prepared with
L = CNCH2SO2C6H4-pCH3, CNCH2Ph, and CNCHPh2, and reacted with a variety of nucleophiles (NH2CH2CO2CH3, CH(CN)2-, CH(CN)CO2CH3-, OH-) and 1,3-dipolarophiles (CF3CN, CH3O2CC ≡CCO2CH3, CH2 = CHCN, RNCO (R = CH3, Ph), RCHO (R = i-C3H7, Ph, C6H4-oOH)) to give carbene, α-aminovinyl, and carboxamido complexes, and C2-metallated heterocycles (imidazoles, pyrroles, oxazolos, oxazolines), respectively. Ready dealkylation occurs of benzhydryl isoeyanide in [Pt(Cl)(CNCHPh2)(PPh3)2]BF4.
Two Dimensional 1H–1H and 13C–1H-Correlation NMR: The Analysis of η3-Allylnickel Complexes
Authors: Benn Reinhard 
Published: February 2015

Abstract
The 1H and 13C NMR spectra of various alkylsubstituted η3-allyl-η5-cyclopentadienyl-nickel complexes were analysed with the help of two dimensional correlation (1H-1H and 1H-13C) NMR. The use of two dimensional NMR techniques for the routine analysis of complicated NMR spectra is demonstrated.
Characterisation of a Binary Transition Metal Complex of a 3ʹ,5ʹ-Cyclic Nucleotide [1]. Preparation and Structure of a Nickel(II) Complex of Guanosine 3ʹ,5ʹ-Cyclic Monophosphate
Authors: Sheldrick W. S. 
Published: February 2015

Abstract
[Ni(3ʹ,5ʹ-cGMP)(H2O)5][3ʹ,5ʹ-cGMP] · 5H2O (1) was isolated from an aqueous solution of Ni(NO3)2 and guanosine 3ʹ,5ʹ-cyclic monophosphate at a pH of 6.5. 1 is orthorhombic P212121 with a = 19.020(4), 6 = 7.718(1), c = 12.316(2) Å, Z = 2, Dc = 1.70 g·cm-3. The structure was refined to R = 0.085 and Rw = 0.077 for 1364 independent reflections. The structure of 1 is disordered. The nickel atom has a site occupation factor of 0.5 with the 3ʹ,5ʹ-cGMP moieties of both cation and anion disordered over the same fourfold general positions. Direct metal binding of the purine N(7) is observed with the octahedral co-ordination of the nickel atom being completed by 5 water oxygens, one of which forms an intramolecular O-H···O hydrogen bond to the guanine O(6). The purine base adopts the syn conformation relative to the ribose ring with xCN = -93.3(8)°. The nucleotide bases are stacked in columns along the b screw dyad axes. Parallel to these columns are cavities which are filled by the water molecules and the complexed nickel cations.
Synthesis and Bioassay of Antagonists of the Luteinizing Hormone Releasing Hormone Having the Azagly10 Moiety
Authors: Folkers Karl , Bowers Cyril Y. , Lutz Wilson B. , Friebel Klaus , Kubiak Teresa , Schircks Bernhard , Rampold Georg 
Published: February 2015

Abstract
Seven new analogs of the luteinizing hormone releasing hormone (LHRH), having an Azagly10 moiety, and three corresponding Gly10 -analogs were synthesized for bioassay and comparison of inhibitory potencies. This study was toward a possible advantage of the Azagly10 moiety to minimize C-terminal degradation, in vivo. Of the three procedures which were studied to achieve Azagly10-peptides, the reaction of cyanate ion with hydrazides was the most favorable. Variations of substitution in position 1 were also studied. The data from the antiovulatory assay showed that an Azagly10 moiety may not depress activity, and may allow equal or even higher activity than the Gly10 moiety, depending on the analog. [N-Ac-D-Thr1 , D-p-Cl-Phe2 , D-Trp3,6, Azagly10]-LHRH was more inhibitory than the corresponding Gly10-analog. Based on pairs of analogs, the following relationships appeared: (1) N-Ac-D-Thr1 was more effective than
N-Ac-p-Cl-Phe1 ; (2) The L-configuration of Ala as N-Ac-Ala1- was more effective than the D-; (3) N-Ac-Ala1 appeared more effective than the N-Ac-D-Thr1 ; (4) D-Trp6 appeared more effective than D-Phe6. In an ultimate clinical use of an antagonist of LHRH to block ovulation, the Azagly10 moiety may be advantageous for limitation of enzymatic degradation.
Stoffwechselprodukte von Mikroorganismen, XXVII[1] Cyclopaldsäure und 3-O-Methyl-cyclopolsäure, zwei antibiotisch wirksame Substanzen aus Aspergillus duricaulis/Investigations on Metabolites of Microorganisms, XXVII [1] Cyelopaldic Acid and 3-O-Methyl Cyclopolic Acid, Two Antibiotically Active Substances from Aspergillus duricaulis
Authors: Achenbach Hans , Mühlenfeld Andreas , Weber Benno , Kohl Werner , Brillinger Gert-Ulf 
Published: February 2015

Abstract
3,5-Dihydroxy-4-formyl-7-methoxy-6-methyl-1(3H)-isobenzofuranone [=cyclopaldic acid] (1) and 5-hydroxy-4-hydroxymethyl-3,7-dimethoxy-6-methyl-1(3H)-isobenzofura-none [= 3-O-methyl cyclopolic acid] (2) were isolated from Aspergillus duricaulis-, those compounds were found to be antibiotically active.
Notizen: S4N4 und seine Derivate: Die Struktur von TaCl5 · S4N4/S4N4 and its Derivatives: Structure of TaCl5 · S4N4
Authors: Tliewalt Ulf , Albrecht Gertrud 
Published: February 2015

Abstract
An X-ray structure determination of TaCl5 · S4N4 shows that the S4N4 group is bonded via one of its nitrogen atoms to the Ta atom thus completing the coordination octahedron around the tantalum center.
Reaktionen von Diphenylsulfilimin Ph2SNH mit Carbonylmetallkomplexen/ Reactions of Diphenylsulfilimine Ph2SNH with Carbonyl Metal Complexes
Authors: Urban Günter , Beck Wolfgang 
Published: February 2015

Abstract
The reaction of the carbonyl metal hydrides (π - C5H5)M (CO)3H(M = Mo, W) with Ph2S = XH gives the ainine-isoeyanato compounds (π - C5H5)(CO)2M(NH3)NCO. N-Carbaxnoyl-B,S-diphenylsulfilimine Ph2S N-C(O) NH2 has boon isolated from the reaction of the hexacarbonyls M(CO)6(M=Cr,Mo) with Ph2S = XH. The spectroscopic data (IR, 1H, 13C NMR, MS) are reported and the formation of the products is discussed.
Synthese von Tetraorganodistibanen und oxidative Spaltung zu Bis(diorganoantimon)oxiden und -Sulfiden/ Synthesis of Tetraorganodistibanes and Oxidative Cleavage to Bis(diorganoantimony) Oxides and Sulfides
Authors: Breunig Hans Joachim , Jawad Hussain 
Published: February 2015

Abstract
The tetraorganodistibanes Pr4Sb2 and Ph4Sb2 were prepared by dehalogenation of the corresponding dioganoantimony bromides with magnesium in tetrahydrofuran. Mass spectra show that the distibanes Me4Sb2, Et4Sb2 and i-Pr4Sb2 react with air to yield the compounds of the formula R4Sb2O (R = Me, Et, i-Pr), which are assumed to be bis- (diorganoantimony)oxides. The species (Me2Sb)2O is also formed by hydrolysis of Me2SbBr. Ir and 1H NMR data of this oxide confirm the proposed structure. The distibanes R4Sb2 (R = Me, Et, Pr, Ph) react quantitatively with sulfur to yield the corresponding bis- (diorganoantimony)sulfides (R2Sb)2, as derived from ms, NMR and IH data. Ms data of the distibanes R4Sb2 (R = Me, Et, i-Pr, Bu, Ph) are reported and discussed.
Thermische und Photo-induzierte Substitutionsreaktionen an der Eisen-ethyl-Verbindung CpFe(CO)2Et. Die Molekülstruktur von CpFe(PMe3)2COEt (Cp =η5-C5H5)/ Thermal and Photo-Induced Substitution Reactions of the Iron Ethyl Compound CpFe(CO)2Et. The Molecular Structure of CpFe(PMe3)2COEt (Cp = η5-C5H5)
Authors: Alt H. G. , Eichner M. E. , Jansen B. M. , Thewalt U. 
Published: February 2015

Abstract
The photo-induced reaction of CpFe(CO)2Et (1) with either trimethylphosphane or trimethylphosphite (L) in solution results in formation of the substitution products CpFe(CO)(L)Et (3), CpFe(L)2Et (5), and the hydrido complexes CpFe(CO)(L)H (4), and CpFe(L)2H (0). In contrast, the thermal reaction of 1 with L yields the adduct CpFe(CO)(L)COEt (7) and the dimeric compound Cp2Fe2(CO)3L. Under photochemical conditions, the terminal carbonyl ligand in 7 can be replaced by L to give the derivative CpFe(L)2COEt (8).
According to a crystal structure determination of CpFe(PMO3)2COEt, the complex possesses a η1 -bonded propionyl ligand. The IR and NMR data, however, are indicative for a η2 -bonded propionyl ligand.
Neues über Fluoride A[CoF4] mit A = Li-Cs sowie über CsFeF4/ News on Fluorides A[CoF4] with A = Li-Cs and on CsFeF4
Authors: Fleischer Thomas , Hoppe Rudolf 
Published: February 2015

Abstract
By fluorination of CsFeBr4 · 2 H2O we obtained a new modification of CsFeF4 (a = 12,491(1), c = 13,272(1) A, Z - 20), which according to powder data crystallizes tetragonally in the structure type of β-RbAlF4, space group I4̄c2. The same structure type is adapted by CsCoF4 (a 12,478(1), c = 12,971(1) Å, Z = 20); in contrast RbCoF4 has similar lattice constants (a = 12,222(1), c = 12,356(2) Å, Z = 20), but another unknown structure; KCoF4 (a = 7,520(1), b = 7,584(1), c = 5,792(1) Å, Z = 4) crystallizes orthorhombic by isotypic to RbFeF4, and NaCoF4 (a - 4,965(1), b = 5,51(5(1), c = 10,800(2) A, Z = 4) is isotypic to NaTiF4. The first compound LiMIIIF4 (MIII = 3dmetals) is LiCoF4, which probably crystallizes monoclinicly (a = 5,540(3), 6 = 4,665(1), c = 5,447(3) Å, = 114,25(5)°, Z = 2). The colour of these cobaltates(III) is violet.
Hydroxo Verbindungen, 11. Zinn(II)-Ethylenglykolat, SnC2H4O2, ein polymerer Chelatkomplex mit 2-fach funktionellem Sauerstoff/ Hydroxy Compounds, 11. Tin(II) Ethylen Glycolate, SnC2H4O2, a Polymerie Chelate Complex with Bi-Functional Oxygen
Authors: Nesper Reinhard , Schnering Hans Georg von 
Published: February 2015

Abstract
Tin(II) ethylene glycolate is prepared from freshly precipitated “tin(II)-hydroxide” on heating in ethylene glycol under reflux. The colourless single crystals, slightly distorted cubes, exhibit rhombohedral symmetry (R3̄-C3i
2, ah = 1547.7 pm, cn= 871.6 pm, Z = 18). The structure is a 3-dimensional networks of linked tin(II) ethylene glycol chelates.
Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, XXVI. Nickelaphosphacycloalkane unterschiedlicher Ringgröße - Kristallstruktur von[(h5-C5H5)NiP(C6H5)2CH2]2/ Preparation and Properties of, and Reactions with, Metal-Containing Heterocycles, XXVI. Xickelaphosphacycloalkanes with Different Ring Sizes - Crystal Structure of [(h5-C5H5)NiP(C6H5)2CH2]2
Authors: Lindner Ekkehard , Bouachir Faouzi , Hiller Wolfgang 
Published: February 2015

Abstract
Substitution of CO in LNi(I)CO (1) (L = h5-C5H5) by the co-chloro-l-(diphenylphosphino) alkanes Cl-[CH2]n-PR2 (2a-d) [R = C6H5; n = 1(a), 2(b), 3(c), 4(d)] leads to the formation of the intermediates for cyclisation LNi(I)PR2-[CH2]nCl (3a-d). When 3a is treated with sodium amalgam, the dimeric phosphino methanide complex [LNiPR2CH2]2 (4′a) is formed. On the basis of an X-ray crystallographic investigation 4'a has a boat conformation and crystallizes monoclinicly in the space group P21/c with Z = 2. The monomeric species

(4a) could not be observed. Five- and six-membered I 1 nickelacycloalkanes of the type

(4c, d) are obtained by reductive cycloelimination of 3c, d. Because of ring strain the nickelaphosphacyclobutane 4b is not accessible under the necessary cyclisation conditions. Into the Ni-C a bond of 4c, d SO2 can be inserted to give the cyclic sulfinato complexes

(5c, d).
Determination of the Rate Constants of the Reactions CO2+ OH– → HCO3— and Barbituric Acid → Barbiturate Anion +H+ Using the Pulse Radiolysis Technique
Authors: Schuchmann Man Nien , Sonntag Clemens von 
Published: February 2015

Abstract
The kinetics of the reactions of CO2 + OH → HCO3
-(i) and barbituric acid →barbiturate anion + H + (ii) have been remeasured using as a new approach the pulse radiolysis technique with optical and conductivity detection. The rate constants obtained in the present study, ki (21 °C) = 6900 ± 700 M-1s-1 and kii (19 °C) = 22 ± 2 s-1 agree within experimental errors with values obtained earlier by other methods.
Synthesen mit aliphatischen Dialdehyden, XXXV. Synthesen mit 1- und 2-Adamantylmalonaldehyd/ Syntheses with Aliphatic Dialdehydes, XXXV. Syntheses with 1- and 2-Adamantyl Malonaldehyde
Authors: Reichardt Christian , Würthwein Ernst-Ulrich 
Published: February 2015

Abstract
The reaction of 1- (1) and 2-adamantyl malonaldehyde (2) with suitable electrophiles and nucleophiles yields adainantyl-substituted open-chain (3-5), carbocyclic (6) as well as heterocyclic compounds (7-19) with peculiar properties due to the presence of the lipophilic adamantyl group. The tetrazolo[1,5-a]pyrimidine (16) exhibits a solvent-dependent tetrazolo-azido valence isomerization reaction.
Synthesen von 3-Hydroxy-tetrahydrochinolin-2.4-dionen Syntheses of 3-Hydroxy-tetrahydroquinoline-2,4-diones
Authors: Stadlbauer Wolfgang , Kappe Thomas 
Published: February 2015

Abstract
Oxidation of 3-alkyl- and 3-arylsubstituted 4-hydroxy-2-quinolones (1) by irradiation with UV light, reaction with 3-chloro-peroxybenzoic acid or hydrogen peroxide in alkaline solution leads to 3-hydroxy-3-substituted quinoline-2,4-diones (2).
Synthese und herbizide Wirkung von substituierten Phenoxymethylphenoxypropionsäurederivaten/ Synthesis and Herbicidal Effect of Substituted Phenoxymethylphenoxypropionic Acid Derivatives
Authors: Koch Manfred , Bieringer Hermann 
Published: February 2015

Abstract
Compounds are herbicides with high activity. Methods for synthesis are reported.
The Principle of Minimum Chemical Distance and the Principle of Minimum Structure Change
Authors: Jochum C. , Gasteiger J. , Ugi I. 
Published: February 2015

Abstract
The principle of minimum chemical distance (PMCD) is derived from the general theory of the BE- and R-matrices, and makes precise the vague classical “principle of minimum structure change”. In fact, the PMCD may be seen as the principle of minimum structure change in mathematical terms. It provides a quantitative measure of chemical similarity of isomeric molecular systems. Its applications lie in the fields of correlations of substructures, elucidation of reaction mechanisms, and evaluation of synthetic pathways as is illustrated by examples. The mathematical foundations of the computer assisted application of the PMCD are presented.