bluuebunny/crossref_metadata_2025_split huggingface dataset:
Zur Reaktion von Pt(PPh3)4 mit [2,3-Bis(diphenylphosphino)-N-methyl-maleinimid]platin(II)-chlorid / Reaction of Pt(PPh3)4 with [2,3-Bis(diphenylphosphino)-N-methylmaleimide]platinum(II)-chloride
Authors: Bensmann Walter , Fenske Dieter , Matern Eberhard 
Published: March 2015

Abstract
[2,3-Bis(diphenylphosphino)-N-methylmaleimide]PtCl2 reacts with Pt(PPh3)4 to form a new diamagnetic Pt-complex 4. Its formation is a result of P-C-cleavage by insertion of Pt. The structure was determined by single crystal X-ray analysis. 4 crystallizes in the triclinic space group P1̄ (4 A), and in the monoclinic space group P 21/c (4B). The lattice constants (at 180 K) are: 4A: a = 1069.9(8), b = 1494.9(11), c = 2013.7(18) pm, α = 84.27(3), β = 86.24(2), γ = 71.91(2)°;4B: a = 1480.8(5), b = 1488.6(5), c = 3302.8(13) pm, β = 102.61(3)°.
Suillin, ein charakteristischer Inhaltsstoff von Röhrlingen der Gattung Suillus (Boletales) / Suillin, a Characteristic M etabolite from Boletes of the Genus Suillus (Boletales)
Authors: Jägers Erhard , Pasupathy Vinayagar , Hovenbitzer Anke , Steglich Wolfgang 
Published: March 2015

Abstract
Fruiting bodies of several Suillus species contain a colourless compound, suillin, which is concentrated in the cuticle of the pileus. Its structure has been established as 4-acetoxy-3-geranyl-geranyl-1,2 -dihydroxybenzene (1) by spectroscopic evidence, conversion into a cyclic carbonate 2 and synthesis of its deacetyl derivative 3.
Biologisch aktive 1,2,4-triazol-und imidazolhaltige phosphorylierte Alkohole / Biologically Active 1,2,4-Triazole and Imidazole Containing Phosphorylated Alcohols
Authors: Ekkehard Lindner , Varughese Kandenkulathu Abraham , Hübner Dieter 
Published: March 2015

Abstract
The addition of the secondary phosphane chalkogenides HP(E)R3
2 (E = O , S) to the 1,2,4-triazole or imidazole containing ketones R1C6H4−C(O)−CHR2−X (2, 3) [X = C2H2N3 (2), C3H3N2 (3)] results in the formation of the phosphorylated alcohols R3
2P(E)−C(OH)C6H4R1−CHR2−X (4, 5). 4, 5 are fungicides with partially high activity. Their structures are discussed on the basis of the IR and NM R spectra.
Kurze inter-und intramolekulare W asserstoffbrückenbindungen in sauren Salzen halogensubstituierter Orthophthalsäuren/ Short Inter-and Intramolecular Hydrogen Bonds in Acid Salts of Halogen-Substituted o-Phthalic Acids
Authors: Mattes Rainer , Dorau Angela 
Published: March 2015

Abstract
The hydrogen bonding in several acid salts of 4,5-dichlorophthalic, 3,6-dichlorophthalic and 3-fluorophthalic acid have been studied by IR spectroscopy and X-ray structure analysis. NH4H [3,6-Cl2C8H2O4] and KH[3-FC8H3O4], with O···O distances of 247 and 254.1(4) pm, respectively, belong to Speakman’s type B2 of acid salts of dicarboxylic acids. In NH4H[4,5-Cl2C8H2O4] · H2O a short hydrogen bond of 253(1) pm is formed to the H2O molecule. A very short intramolecular hydrogen bond of only 234.0(10) pm length was found in N(C4H9)4H[4,5-Cl2C8H2O4], In the [3,6-Cl2C8H2O4]2- dianion both carboxylate groups are nearly orthogonal to the phenyl ring.
Beiträge zur Chemie der Carbonylkomplexe mit Germanium-bzw. Zinn-Übergangsmetall-Bindungen/ Contributions to the Chemistry of Carbonyl Complexes with Germanium or Tin Transition Metal Bonds
Authors: Behrens Helmut , Moll Matthias , Merbach Peter , Trümmer Karl-Heinz 
Published: March 2015

Abstract
Dihalogeno bis(carbonylm etalato) germanium (IV) and tin(IV ) com pounds listed in Table I are obtained in high yields by the reaction o f TlCo(CO)4 or TlFe(CO)3NO with trihalogeno carbonylmetalato germanium(IV) and tin(IV) complexes. The new com pounds are characterized by their analyses, mass and vibrational spectra.
Darstellung und Schwingungsspektren von Fluoro-Chloro-Osmaten(V)/ Preparation and Vibrational Spectra of Fluoro-Chloro-Osm ates(V)
Authors: Preetz W. , Groth Th. 
Published: March 2015

Abstract
By oxidation of the pure fluoro-chloro-osmates(IV ) with BrF3 in dichlorom ethane the mixed pentavalent complexes [OsF5Cl]-, cis-[OsF4Cl2]-, fac-[OsF3Cl3]- and cis-[OsF2Cl4]- are formed without replacement of ligands. Trans-[OsF4Cl2]- and trans-[OsF2Cl4]- are generated from the corresponding osmates(IV) by oxidation with PbO2 in dichloromethane under addition of trifluoroacetic acid. The vibrational spectra o f the mixed ligand complexes are assigned according to point groups D4h, C4v, C3v and C2v. The increased bond strength com pared with the corresponding Os(IV ) complexes is indicated by a significant shift to higher energy by about 5 -15% . The Os -Cl stretching vibration of [OsF5Cl]- and also the symmetric ClOsCl of trans-[OsF4Cl2]- is split by the isotopes 35Cl and 37Cl, showing two and three well resolved sharp Raman lines in the expected ratio of intensities, respectively.
Das Dispiro[5.1.5.1]tetradecan-Gerüst als Baustein für thermotrope Flüssigkristalle / Thermotropic Liquid Crystals Containing the Dispiro[5.1.5.1]tetradecane Unit
Authors: Calaminus W. , Vögtle F. , Eidenschink R. 
Published: March 2015

Abstract
Several 3 .11-disubstituted dispiro[5.1.5.1]tetradecane-7,14-dions were prepared and the cis/trans-isomers were separated. The trans -stereoisomers were converted into the gem-dihalide ketones and mono- and dithioketones. The phase transfer temperatures were determined. Liquid crystal phases were observed.
A New Alkaloid from Root Bark of Capparis decidua
Authors: Ahmad Viqar Uddin , Arif Shoib , Amber Aziz-ur-Rahman , Nasir M. Ajmal , Ghani K. Usman 
Published: March 2015

Abstract
A new spermidine alkaloid, capparisine (1) has been isolated from the alcoholic extract of the root bark of Capparis decidua, and its structure was elucidated by spectral studies.
Assignment of 31P Chemical Shifts to Isomers of 2,3-Dialkoxy-λ3-diazadiphosphetidines — Crystal and Molecular Structure of trans-[PhNP(OCH2CF3)]2
Authors: Kumaravel S. S. , Krishnamurthy S. S. 
Published: March 2015

Abstract
Geometrical isomers of λ3-diazadiphosphetidines show large differences in their 31P chemical shifts. Trifluoroethoxylation of cis-(PhNPCl)2 gives only the 'low-field' isomer initially, for which the crystal structure is determined. The compound crystallises in the triclinic space group P1̄ with a = 9 .6 2 4 (4 ).6 = 10.107(4),c = 11.140(7) Å ; a = 105.65(4),β = 110.59(4),y = 93.82(3)°;and Z = 2. The structure was solved by direct methods and refined to R = 0.045. The alkoxy groups are trans to each other. On standing in solution. trans -[PhNP(OCH2CF3)]2 transforms slowly and almost completely into its cis analogue with a high field 31P chemical shift
Alkoxistannate, II [1] Tri(tert-butoxi)alkalistannate(II): Darstellung und Strukturen / Alkoxistannate, II [1] Tri(tert-butoxi)alkalistannates(II): Synthesis and Structures
Authors: Veith M. , Rosier R. 
Published: March 2015

Abstract
Tri(tert-butoxi)alkalistannates (M(O'Bu)3Sn, M = Li, Na, K, Rb, Cs) are obtained by reaction of alkali-fert-butanolates with tindi-tert-butoxide. If M equals Li or Na (1, 2) molecular com pounds are formed, which consist of two formula units. 1 crystallizes in a m onoclinic cell (space group P21/c; a = 966.5(3), b = 1819(1), c = 1014(1) pm. β = 107.1(1)°, Z = 4); 2 is triclinic (space group P1̄; a = 1041(1), b = 2046(1), c = 1033(1) pm. a = 92.3(2), β = 118.6(1), y = 108.3(3)° and Z = 4). The molecules 1 and 2 are closely related structurally despite their different space groups. The common structural feature is a Sn2O6M2 cage, which is built of two seco-norcubane Sn2M2O , units, sharing a M2O2 four-membered ring. Characteristic distances are: 1: Sn-O = 209.3, L i-O = 193.0 and 211.6 pm, 2: Sn-O = 210.5, Na-O = 227.4 and 240.7 pm. The tert/-butoxistannates of K, Rb and Cs (3, 4, 5) all crystallize in the orthorhombic crystal system, space group P212121 (cell constants of 3: a = 1907(1), b - 1060(1), c - 896(1) pm, Z = 4). Contrary to the lithium- and sodium derivates 3, 4 and 5 have a polymeric structure. The one dimensional polymer consists of distorted trigonal bipyramidal SnO3M “cages” (substituted at the oxygen atoms by tertbutyl groups), which align in a way to allow the metal atom to have a five-fold oxygen coordination. The tin atoms have trigonal pyramidal coordination. While the tin-oxygen bond lengths are essentially invariant (average value 206.7 pm ), the potassium-oxygen distances range from 256.4(5) pm to 318.8(6) pm
Synthese, Molekül- und Kristallstruktur von 3-(2,6-Dimethylphenylamino)-4,5-diethyl-1,2,3-diselenaborol / Synthesis, Molecular and Crystal Structure of 3-(2,6-Dimethylphenylamino)-4,5-diethyl-1,2,3-diselenaborole
Authors: Habben Carl , Meller Anton , Noltemeyer Mathias , Sheldrick George M. 
Published: March 2015

Abstract
The title com pound, isolated from the reaction of 3-iodo-4,5-diethyl-1,2,3-diselenaborol with N-lithio-2,6-dim ethylaniline, crystallizes in space group C 2/c with a = 1511.8(3) pm, b = 901.6(2) pm, c = 2444.4(6) pm, and β = 104.17(2)°. Refinement converged to R = 0.042 for 1555 observed unique reflections. 1H, 11B , 13C, 14N, 77Se NMR and MS data are also reported, and the results are compared with those o f the sulfur analog
The Molecular Structure of 4-Methyl Benzenesulfonyl Chloride
Authors: Rigotti G. , Rivero B. E. , Filgueira R. R. 
Published: March 2015

Abstract
The m olecular structure of C7H7SO2Cl was determined by X-ray diffraction and refined to R = 0.060 and Rw = 0.053 from 1170 unique reflections. The unit cell is triclinic, P1̄ , with Z = 2, a = 8.528(5), b = 8.214(3), c = 6.306(2) A; a = 95.47(3), β = 104.41(3), γ = 93.08(4)°; V = 424.6(3) Å3; ju = 6.30 cm-1; δcalc = 1.49 M g-m-3; F(000) = 196.
The dihedral angle between the benzene ring and the Cl - S - C (1) plane [84.3(1)°] is similar to those observed for benzenesulfonyl chlorides where molecular packing results from normal van der Waals interactions [1, 2], The compound has normal bond lengths and angles. Distortion of the benzene ring is in agreement with the predicted a- and π-effects of substituent groups [3], No significantly short intermolecular distances were found
Imidazolkatalysierte Ringerweiterung von 2-(Diarylmethyl)- und 2-(ArylaIkyI)-1,2-oxazetidin-3-onen zu 4-Oxazolidinonen / Imidazole-Catalyzed Ring Expansion of 2-(DiaryIm ethyl)- and 2-(Arylalkyl)-1,2-oxazetidin-3-ones to 4-Oxazolidinones
Authors: Lauterbach Thomas , Geffken Detlef 
Published: March 2015

Abstract
The imidazole-catalyzed ring expansion of 2-(diarylmethyl)- and 2-(arylalkyl)-1,2-oxazetidin- 3-ones 2, easily obtained from the corresponding glycolohydroxamic acids 5, produces 4-oxazolidinones 4 in high yields. In most cases the reaction can be carried out by reacting the hydroxamic acids 5 with 1, 1'-carbonyldiim idazole. Compounds 4a and 4f arise by thermolytic fragmentation of the corresponding perhydro-1,5,2-dioxazinan-3,6-diones 1a, d.
Die Spektren und Kristallstrukturen der Addukte CI5Sb · [N(i-C3H7)CN(i-C3H7)] und Cl4Sn · 2 [N(i-C3H7)CN(i-C3H7)] / Spectra and Crystal Structures of the Adducts Cl5Sb · [N(i-C3H7)CN(i-C3H7)] and Cl4Sn · 2 [N(i-C3H7)CN(i-C3H7)]
Authors: Hausen H.-D. , Schwarz W. , Rajca G . , Weidlein J. 
Published: March 2015

Abstract
Spectra and Crystal Structures of the Adducts C l5Sb • [N(/-C3H 7)C N (i-C3H 7)] and C l4Sn • 2 [N(/-C3H 7)CN(/-C3H 7)j X-Ray, Vibrational Data, Diisopropylcarbodiimide Adducts of SbCl5, SnCl4 Thecarbodiimide adducts Cl5Sb <-(—N (R) = C = N R)(1) and Cl4S n ^ (-N (R) = C = N R) 2(2)(R = /-C3H 7) have been prepared by the reaction o f R —N = C —N — R with SbCl5 in a 1:1 and with SnCl4 in a 2:1 molar ratio, respectively. The vibrational spectra (IR and Raman) of both compounds have been regarded and assigned to the skeleton modes. The X-ray structure determination shows the orthorhombic space group Pna2, with 4 formula units per unit cell for 1. Adduct 2 has a trans-configuration and crystallizes in the triclinic space group P 1 with only one molecule per unit cell.
Uber die Wellenlängen-Abhängigkeit der Photo-Eliminierung des Biphenyl-Systems aus cis-Bis(phenyl)platin(II)-Verbindungen / On the Wavelength Dependence of the Photoelimination of the Biphenyl System from cis -Bis(phenyl)platinum (II) Compounds
Authors: Brune Hans Albert , Mayr Ulrike , Schmidtberg Günther 
Published: March 2015

Abstract
Excitation of the compounds cis -{Pt[P(n-C4H9)3]2(4-XC6H4)2} with radiation o f the wavelengths 287.5 and 312.0 nm resulted in the reductive elimination of the substituted biphenyls 4-XC6H4-C6H4X-(4) (X=CF3,CH3,C(CH3)3,OCH3), whereas they are photostable towards irradiation of 253.5 nm. It is demonstrated that the elimination is a regiospecific pericyclic reaction at platinum; no free radicals are involved.
Darstellung und Kristallstruktur von Palladiumoxidchlorid Pd2OCl2/Preparation and Crystal Structure of Palladium Oxide Chloride Pd2OCl2
Authors: Dannecker Beate , Thiele Gerhard 
Published: March 2015

Abstract
Pd2OCl2 was obtained by reaction of γ-PdCl2 and PdO·nH2O in a KNO3/NaNO3 melt at 450 °C. Single crystals were grown from a TlCl flux. The crystal structure of the tetragonal compound (a = 631.3(2) pm, c = 987.2(2) pm, space group I41 /amd) is built up from bands of edge shared square planar PdO2Cl2 groups connected by common O-atoms to a framework. The relationship between the structures of Pd2OCl2 and PdO is discussed.
Darstellung und Kristallstrukturen von LiGaBr4 und LiGaBr3/Preparation and Crystal Structure of LiGaBr4 and LiGaBr3
Authors: Hönle Wolfgang , Simon Arndt 
Published: March 2015

Abstract
The com pounds LiGaBr4 and LiGaBr3 are prepared by reaction of stoichiometric mixtures of LiBr and GaBr3 or GaBr2, respectively, in glass am poules at 250 °C. Single crystal X-ray studies show LiGaBr4 to be isotypic to LiAlCl4 containing GaBr4 tetrahedra arranged as in the structure of SnBr4 and Li+ ions filling octahedral voids [d̄(GaBr) = 232.5, d̄(Li -Br) = 280.3 pm]. LiGaBr, has to be formulated as Li2[Ga2Br6] and the Ga -Ga-bonded unit Ga2Br6 has an ecliptic confor­mation. The L i+ ions occupy octahedral voids, and the LiBr6 octahedra are linked via apices, [d(Ga -Ga) = 240.4, d̄(Ga -Br) = 238.9, d̄(L i-B r) = 281.1 pm]. The structures is compared with the structures of PuBr3, Re3B, FeB and Ga2I3, and the group-subgroup relationship with GdFeO3 is established.
Darstellung und Molekülstruktur des Ferrocenylkomplexes CpW(NO)2Fc und seine Oxidation zu CpWO2Fc/Synthesis and Molecular Structure of the Ferrocenyl Complex CpW(NO)2Fc and its Oxidation to CpWO2Fc
Authors: Herberhold Max , Kniesel Heidemarie , Haumaier Ludwig , Gieren Alfred , Ruiz-Péreza Catalina 
Published: March 2015

Abstract
The σ-ferrocenyl complex CpW (NO)2Fc (1) was prepared from CpW (NO)2Cl and ferrocenyl lithium, and oxidized by air in CH2Cl2 solution to give CpWO2Fc (2). An X-ray crystal structure analysis of 1 indicated the presence of two almost linear nitrosyl groups (with W -N -O angles of 173.0(9) and 175.4(7)°). The W -C (ferrocenyl) bond length is 2.164(10) Å.
Biflavonoide aus Schinus terebinthifolius Raddi (Anacardiaceae)/ Biflavonoids from Schinus terebinthifolius Raddi (Anacardiaceae)
Authors: Skopp Gisela , Schwenker Gerhard 
Published: March 2015

Abstract
Three biflavonoids together with gallic acid have been isolated for the first time from the drupes of S. terebinthifolius. They have been characterized through chemical and spectral data.
Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: Das isotype Paar BaC6X2O4 · 3 H2O (X = Cl, Br) / Complexes with Substituted 2,5-Dihydroxy-p-benzochinones: The Isotypic Pair BaC6X2O4 · 3 H2O (X = Cl, Br)
Authors: Robl Christian , Weiss Armin 
Published: March 2015

Abstract
BaC6X2O4 · 3H2O (X = Cl, Br) crystallizes in the orthorhombic space group Cmca. 4 of the 8 oxygen atoms around Ba2+ belong to two different dianions, chelating Ba2+. In this way 1-dimensional corrugated chains are formed, interlinked by two oxygen atoms of neighbouring chains, thus forming layers. This interconnection is of polar character within a layer. The in­terlinking oxygen atoms have one carbon- and two Ba2+ neighbours. CN 8 is completed by two water molecules. The latter and a further water molecule situated between the layers may be removed reversibly in a topochemical reaction without destruction of the structure.
Reaktionen von Wolframhexafluorid mit N-Trimethylsilyliminotriphosphoranen — Kristallstruktur von (Me3P = N)2WF4 / Reactions of Tungsten Hexafluoride with N-Trimethylsilyliminotriphosphoranes — Crystal Structure of (Me3P = N)2WF4
Authors: Roesky Herbert W. , Katti Kattesh V. , Seseke Ulrich , Scholz Uwe , Herbst Regine , Egert Ernst , Sheldrick George M. 
Published: March 2015

Abstract
The phosphiniminato-substituted tungsten(VI) fluorides (PhpMe)3P=NWF5 (2), [(PhpMe)3P=N]2WF4 (3), (Me3P=N)2WF4 (4) and [(t-buNH)Ph2P=N]2WF4 (6) have been pre­pared from the corresponding SiMe3 derivatives by reaction with WF6. The starting materials (PhpMe)3P = NSiMe3 (1) and (t-buNH)Ph2P=NSiMe3 (5) are obtained by the reaction of the phosphanes with Me3SiN3. The crystal structure of 4 shows that the cis isomer was formed. Although the molecular geometry of 4 is similar to that of (Ph3P=N)2WF4, some important differences are observed arising from the different electronic properties of the substituents.
Synthesewege zu einfachen Di- und Trisilylmethanen: Potentielle Ausgangsstoffe für die CVD-Abscheidung von amorphem Silicium a-SiC: H / Synthetic Pathways to Simple Di- and Trisilylmethanes: Potential Starting Materials for the CVD Deposition of Amorphous Silicon a-SiC :H
Authors: Schmidbaur Hubert , Ebenhöch Jan 
Published: March 2015

Abstract
Methods for the preparation of simple silaalkanes with a high content of silicon and hydrogen have been explored. Target molecules, like H3SiCH2SiH3 and HC(SiH3)3, may serve as precursor molecules for the production of photovoltaic elements through thermal or discharge (plasma) CVD processes. Among a variety of synthetic pathways, the reactions between HSiCl3 and HCCl3 in the presence of an amine (Benkeser reaction) and the direct synthesis from silicon and polychloromethanes proved most promising for large scale preparations. The CH2X2/KSiH3 metathesis is most useful on the laboratory scale. - The Grignard synthesis was employed for partly methylated homologues, like H3SiCH2SiH2CH3, H3SiCH2SiH(CH3)2, H3SiCH2Si(CH3)3, and related molecules. The magnesium reduction of CHBr3/SiCl4 and CHBr3/CH3SiCl3 mixtures serves best for the preparation of HC(SiCl3)3, which can be converted into HC(SiH3)3 using LiAlH4. Attempts to synthesize tetrasilylmethane via the same route, C(SiH3)4, led only to the formation of HC(SiH3)3.
Übergangsmetallkomplexe mit Schwefelliganden, XXIV* Reduktive Nitrosylierung von [MoCl2(dttd)] zu [Mo(NO)2(dttd)];Eigenschaften, Struktur und Reaktion zu NPR3-Komplexen[Mo(NO)(NPR3)dttd] (PR3=PMe3, PEt3, PMePh2, PEtPh2, PPh3;dttd2-=2,3,8,9-Dibenzo-1,4,7,10-tetrahiadecan(2-)) / Transition Metal Complexes with Sulfur Ligands, XXIV*Reductive Nitrosylation of [MoCl2(dttd)] to [Mo(NO)2(dttd); Properties, Structure an Reaction to NPR3 Complexes [Mo(NO)(NPR3)dttd] (PR3=PMe3, PEt3, PMePh2, PEtPh2, PPh3; dttd2-=2,3,8,9-dibenzo-1,4,7,10-tetrahiadecane (2-))
Authors: Sellmann Dieter , Keller Johannes , Moll Matthias , Beck Horst Philipp , Milius Wolfgang 
Published: March 2015

Abstract
In order to study the properties of sulfur coordinated transition metal centers. [MoCl2dttd] (dttd2 = 2,3,8,9-dibenzo-1,4.7,10-tetrathiadecane(2-)) was reacted with NO in the presence of Zn. [Mo(NO)2dttd] was obtained whose X-ray structure analysis shows that Mo is coordinated pseudo-octahedrally by two trans thiolato S, two cis thioether S as well as two cis N atoms of nearly linear MoNO groups. With respect to its low v(NO) frequencies (1760/1665 cm -1) and quite normal bond lengths as well as angles [Mo(NO)2dttd] shows unexpectedly facile and rapid reactions with nucleophiles; with two equivalents of PR3 (PMe3, PEt3, PMePh2, PEtPh2, PPh3) it yields the corresponding phosphiniminato complexes [Mo(NO)(NPR3)dttd] and free phosphinoxides OPR3, respectively. Reaction mechanisms as well as the bonding situation in the [Mo(NPR3)] entity are discussed; on the basis of 95Mo and 14N NMR it is concluded that the conversion of NO into NPR3 ligands includes a reduction of N(+2) to N(-3) as well as an oxidation of (formal) Mo(+2) to Mo(+3). With H2O the [Mo(NO)(NPR3)dttd] complexes hydro­lyze with loss of the NPR3 ligands and formation of binuclear [Mo(NO)dttd]2. The ease of hydrolysis depends on the substituents R: In THF [Mo(NO)(NPMe3)dttd] hydrolyzes at 20 °C within a few minutes, [Mo(NO)(NPPh3)dttd], however, needs the addition of cone. HCl.
Absorption and Fluorescence Spectra of Bis(porphyrinato)zinc(II) Complexes with a Flexible Polyatomic Chain
Authors: Nishida Yuzo , Okamoto Masaya , Kida Sigeo 
Published: March 2015

Abstract
Relationship between the steric conformation and the efficiency of energy transfer in binuclear zinc(II) porphyrin complexes was interpreted in terms of the absorption and fluorescence spectra.
Wrightiin, a New Chlorinated Depside from Erioderma wrightii Tuck (Ascolichenes)
Authors: Maass Wolfgang S. G. , Hanson Alfred W. 
Published: March 2015

Abstract
The structure of wrightiin, a depside metabolite of Erioderm a wrightii is shown by X-ray crystalo-graphy to be 2. The mass spectrum is anomalous.
Mangan(II)-Komplexe mit dem vierzähnigen Stickstoffliganden C12H22N6(L): Synthese von [MnX2L] (X = Cl, Br, I, NCS), Kristallstrukturen von [MnCl2L] und [MnBr2L] / Manganese(II) Complexes with the Tetradentate Nitrogen Ligand C12H22N6(L): Synthesis of [MnX2L] (Χ = Cl, Br, I, NCS), Crystal Structures of [MnCl2L] and [MnBr2L]
Authors: Stolz Peter , Saak Wolfgang , Strasdeit Henry , Pohl Siegfried 
Published: March 2015

[MnCl2(C12H22N6)] (1) and [MnBr2(C12H22N6)] (2) are obtained from the reaction of MnX2 (X = Cl, Br) with C12H22N6 in methanolic solution.
In chloroform MnI2, OPPh3, and C12H22N6 react to give [MnI2(C12H22N6)] (3). With small variations of the reaction conditions [MnI2(C12H22N6)] · xCHCl3 (4) may be crystallized. The reaction of [Mn(NCS)2(OPPh3)4] with C12H22N6 in CHCl3 solution gives [Mn(NCS)2(C12H22N6)] · xCHCl3 (5). The structures of 1 and 2 were determined from single crystal X-ray diffraction data. The isotypic compounds crystallize in the orthorhombic space group Pbcn with Z = 4; 1: a = 1592.4(1), b = 785.0(1), c = 1270.7(1) pm; 2: a = 1590.0(1), b = 802.6(1), c = 1316.6(1) pm. C12H22N6 acts as a tetradentate ligand. The isolated complexes exhibit a twofold symmetry.
Manganese(II) is in a six-coordinate environment, which can be described better as a distorted tetrahedron with two additional Mn-N bonds rather than as a distorted octahedron.
The Mn-N bond lengths are 229.9(1) and 248.7(1) pm for 1 and 228.2(3) and 248.4(3) pm for 2. The Mn-Hal bond lengths are 239.2(1) (1) and 254.2(1) pm (2)
Zur Komplexchemie der Alkalimetalle: Kristallstruktur von RbLiS / On the Complex Chemistry of the Alkali Metals: The Crystal Structure of RbLiS
Authors: Sabrowsky Horst , Hippler Karin , Hitzbleck Rolf-Dieter , Sitta Stephan , Thimm Alfred , Vogt Petra , Wortmann Regina 
Published: March 2015

The colourless compound RbLiS has been prepared as described earlier (H. Sabrowsky, A. Thimm, and P. Vogt-Mertens, Z. Naturforsch. 40b, 1759 (1985)) and its crystal structure determined by X-ray diffraction. Very hygroscopic RbLiS crystallizes in the tetragonal space group P4/nmm (Z = 2) with the cell parameters a = 4.424(3) Å, c = 7.255(2) Å. The structure was solved from 1635 counter reflections (155 symmetry independent reflections) by Patterson and Fourier methods (R = 0.031; wR = 0.031).
The structure is characterized by layers of ∞
2[LiS4/4]-tetrahedrons separated by double-layers of Rb+ to form a PbFCl-type geometry.