bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of 2-Cinnamoyl-1,3-indandione Derivatives and their Reactions with Hydrazine, Hydroxylamine Hydrochloride, Thiourea, Secondary Amines and Diethyl Oxalate
Authors: Afsah El - Sayed , Amer Fathy Abdel Kader , Etman Hassan 
Published: February 2015

Abstract
A series of 2-cinnamoyl-1,3-indandiones (2a-e) were obtained by condensing 1 with aldehydes. Treatment of 2 a with hydrazine or hydroxylamine hydrochloride gave 2-(5-phenyl-2-pyrazolinyl or -isoxazolinyl)-1,3-indandione (3 and 5) respectively, and when treated with thiourea gave 2-(6-phenyl-2-thioxo-4-pyrimidinyl)-1,3-indandione (6).
The formation of 2-(β-piperidino-, -morpholino- and -arylmercaptohydrocinnamoyl)- 1,3-indandiones (7a-b and 8a-b) from 2 a was investigated. Compound 7b when treated with hydrazine gave 9. The 2-(α, β-dimorpholinohydrocinnamoyl) derivative (11) was obtained by the action of morpholine on the dibromo derivative (10). The Michael condensation of 2a with ethyl acetoacetate or acetyl acetone was investigated. Treatment of 1 with benzaldehyde in (3:1) molar ratio gave 14, which reacted with diethyl oxalate to give 15. Cyclization of 15 with polyphosphoric acid lead to the formation of 16.
Arylhydrazonothiazolidinones: Ring Cleavage and Alkylation of the 5-Arylhydrazono Derivatives of Rhodanine and Isorhodanine
Authors: Kassab Nazmi A. , Allah Sanaa O. Abd , Elbahaii Said A. 
Published: February 2015

Abstract
The 5-arylhydrazono derivatives of rhodanine and isorhodanine were subjected to the action of hydrazine hydrate to afford the arylhydrazonomercaptomethyl-triazolinones (3) and -triazolinthiones (3) respectively. Treatment of 1 with benzylamine afforded thioxalic acid dibenzylamide (5). On the other hand treatment of 2 with the same reagent afforded the corresponding benzylimino derivatives (6).
Alkylation of 1 and 2 with ethyl bromoacetate and chloroacetamide yielded the corresponding S-alkyl derivatives (7) and (8), respectively.
The Utilization of Sulfur, Sulfenyl, Selenenyl, and Seleninyl Chlorides in the Conversion of Aldoximes to Nitriles
Authors: Sosnovsky George , Krogh James A. 
Published: February 2015

Abstract
The comparative usefulness of six sulfur, sulfenyl, selenenyl, and seleninyl chlorides towards aldoximes in the presence of a base were examined under similar reaction condi-tions. The reactions of aromatic aldoximes with either sulfur dichloride (1), sulfur mono-chloride (2), or trichloromethane sulfenyl chloride (3) in either ether or chloroform at 23-35 °C after one hour resulted in 60-84% yields of nitriles. Under the same conditions, the reactions of aliphatic aldoximes with either 1, 2, or 3 gave mixtures of products, while at -40 to -30 °C, 15-22% yields of aliphatic nitriles were obtained. The reactions of aliphatic and aromatic oximes with either benzenesulfenyl chloride (4), benzene-selenenyl chloride (5), or benzeneseleninyl chloride (6) produced after fifteen minutes to three hours the corresponding nitriles in 71-96% yields at 23-35 °C.
13C, 1H-Spin-Spin Kopplungskonstanten, Teil IVAdamantan / 13C, 1H Spin-Spin Coupling Constants, Part IVAdamantane
Authors: Aydin Rafet , Günther Harald 
Published: February 2015

Abstract
One-bond, geminal, and vicinal 13C, 1H coupling constants have been determined for adamantane using α-and β-[D]adamantane and the relation nJp(13C, 1H) = 6,5144 nJ(13C, 2H) for the conversion of the measured nJ(13C, 2H) values. It is shown that the magnitude of 3Jtrans is strongly influenced by the substitution pattern. Relative H,D isotope effects for 13C chemical shifts are given.
15N—NMR-Spektroskopische Untersuchung von Dimethylaluminiumazid, Dimethylgalliumazid und Dimethylarsenazid /15N NMR Spectra of the Azides of Dimethylaluminium, Dimethylgallium, and Dimethylarsenic
Authors: Müller Joachim 
Published: February 2015

Abstract
By new preparative methods [(CH3)2AlN3]3, [(CH3)2GaN3]3, and (CH3)2AsN3 were 15N-labelled. The compounds show a temperature-dependent exchange of the azido groups on the NMR time scale. For the last two compounds the vibrational spectra were recorded and discussed.
Synthese und Struktur der Phasen K2CdSn und K2CdPb / Synthesis and Structure of the Phase K2CdSn and K2CdPb
Authors: Matthes Reinhard , Schuster Hans-Uwe 
Published: February 2015

Abstract
K2CdPb crystallizes orthorhombically, with space group Ama2 = Cmc2, a = 645.8 pm, b = 860.2 pm, c - 1095.5 pm. The structure is built of a potassium-3D-net forming eight-edged channels parallel to the a-axis; these channels are penetrated by infinite Cd-Pb-zigzag-chains. The powder-diagram shows the homologous phase K2CdSn (a = 643.2 pm, b = 854.3 pm, c = 1087.7 pm) to be isotypic to K2CdPb.
Bildung von Alkylcarbenium-Ionen im System Aluminium-(Gallium-)halogenid/Halogenwasserstoff / Formation of Alkylcarbenium Ions in the System Aluminium (Gallium) Halide/ Hydrogen Halide
Authors: Kalchsclimid Franz , Mayer Erwin 
Published: February 2015

Abstract
The tert-butyl cation is formed in the reaction of tert-BuCl with AlCl3 or GaCl3 in anhydrous liquid HCl as a solvent, or of tert-BuBr with AlBr3 in HBr. At - 30 °C solutions of [C(CH3)3
+] are stable. At room temperature very slow decomposition occurs over months. In the systems BCI3/HCl, InCl3/HCl and BBr3/HBr no formation of [C(CH3)3+] from the corresponding tert-butyl halide was observed. The tert-amyl cation can be stabilized only in AlBr3/HBr. The iso-propyl cation is not stable in any of the systems investigated. The ability of the Lewis acids employed to form carbenium ions corresponds with their catalytic activity in Friedel-Crafts alkylations.
Untersuchungen zur Existenz der Radikale Cp(CO)3M (M = Cr, Mo, W) / Investigations on the Existence of the Radicals Cp(CO)3M (M = Cr, Mo, W)
Authors: Madach Thomas , Vahrenkamp Heinrich 
Published: February 2015

Abstract
The mutual interconversions of the species Cp(CO)3M- (2), Cp(CO)3M-M′(CO)3Cp (1), and Cp(CO)3M (3), (M,M′ = Cr, Mo, W) were investigated. Of the mixed dinuclear complexes 1, the Cr-Mo and Cr-W compounds were prepared for the first time, and the Mo-W compound was shown not to exist in a pure state. The Mo and W radicals 3, in contrast to the corresponding Cr radical, are not stable in measurable quantities in solution. Electrochemical measurements as well as simple redox and redistribution reactions, however, prove their ready formation and existence under normal conditions. There is a good correlation between the energies of the σ-σ* transitions of the metal-metal bonded dimers (1) and the electrochemical potentials for their reductive cleavage.
η3- Allymetall-Schwefel-Cluster des Nickels, Palladiums und Platins / η3-Allyl Metal Sulfur Cluster Compounds of Nickel, Palladium, and Platinum
Authors: Bogdanović Borislav , Goddard Richard , Göttsch Peter , Krüger Carl , Schlichte Klaus , Tsay Yi-Hung 
Published: February 2015

Abstract
Novel cluster compounds of the composition [(η3-C3H5)2M2S]x, wherein M represents nickel, palladium or platinum are obtained by reaction of 2,5-disubstituted-1,6,6a-trithiopentalenes or H2S with (η3-C3H5)2M in THF solution. The molecular structure of one of these new cluster types [(η3-C3H5Ni)2S]3 has been established by X-ray methods. It is best described as being a fraction of a NiS-framework in which peripheral coordination sites are occupied by partial disordered η3-allyl groups. Molecular data (cell data: a = 19.868(4), b = 8.988(2), c = 14.501(3) Å, β = 115.30(2)°, space group C2/c, Z = 4, R = 0.106) are compared with the parent Bs-NiS lattice. Spectroscopic evidence for the structural similarity of the related Pd- and Pt-compounds is given.
Die Einzelkomponenten der Bacteriophäophorbidmethylester von Bacteriochlorophyll c und d / The Individual Components of Bacteriophaeophorbide Methyl Esters from Bacteriochlorophyll c and d
Authors: Kemmer Thorsten , Brockmann Hans , Risch Nikolaus 
Published: February 2015

Abstract
The preparative column chromatographic separation on small grained silica gel of the bacteriophaeophorbide-c- and -d-methyl esters into their homologous and isomeric components is described. The influence of particular regions of the molecule, which carry different alkyl-substituents, on the chromatographic separability is selectively enhanced through the variation of the eluent. Mass and 1H NMR spectra of the pure components are discussed.
Vinyldifluorphosphorane: Synthese durch Direktfluorierung und Additionsverhalten [1]. / Vinyldifluorophosphoranes: Synthesis by Direct Fluorination and Addition Behaviour [1].
Authors: Ruppert Ingo 
Published: February 2015

Abstract
The vinyldifluorophosphoranes PhnPF2(CH = CH2)3-n (2a: n = 1, 2b: n = 2) or Ph2PF2(C6H4-CH = CH2) 4 were obtained in good yield by direct fluorination of the corresponding phosphines. Catalytic addition of Ph2PH or PhPH2 to 2b gives phosphino-ethyl-substituted fluorophosphoranes which have not yet been obtained by partial fluorination. The structures have been established by NMR (19F, 31P) and in addition by sulfurisation. Whereas 2b does not polymerize, homopolymerisation of the styrene derivative 4 gives polymer fixed difluorophosphorane.
Darstellung, Eigenschaften und Kristallstruktur von Rhenium(VII)-Nitridchlorid, ReNCl4 / Preparation, Properties and Crystal Structure of Rhenium(VII) Nitride Chloride, ReNCl4
Authors: Liese Werner , Dehnicke Kurt , Walker Ingeborg , Strähle Joachim 
Published: February 2015

Abstract
Rhenium(VII) nitride chloride, ReNCl4, is prepared by the reaction of ReCl5 with nitrogen trichloride. It forms metallic glazing, hygroscopic needles with an effective magnetic moment of 0.23 B.M. In the mass spectrum only the molecular ion ReNCl4
⊕ is present, followed by ReNCl3
⊕. The crystal structure was determined by X-ray diffraction methods (space group Il, 265 independent reflexions, R = 0.071). The structure consists of ReNCl4 units, which are linked by strongly alternated Re ≡ N-Re chains with different bond lengths of r Re ≡ N = 158 pm and r Re-N = 248 pm. The structure is very similar to that of WOCl4.
Topotactic Electron/Ion Transfer Reactions of Niobium Chalcogenides Nb3X4 with Tunnel Structure
Authors: Schöllhorn Robert , Schramm Wolfgang 
Published: February 2015

Abstract
Cathodic reduction of Nb3S4 and Nb3Se4 electrodes in electrolytes containing cations of appropriate size results in the formation of ternary phases An+
x/n[Nb3X4]x-. The cations An+ are taken up into empty channels of the rigid lattice framework and exhibit high ionic mobility at room temperature.
Die Strukturen der essentiellen ungesättigten Fettsäuren, Kristallstruktur der Linolsäure sowie Hinweise auf die Kristallstrukturen der α-Linolensäure und der Arachidonsäure / The Structures of the Essential Unsaturated Fatty Acids. Crystal Structure of Linoleic Acid and Evidence for the Crystal Structures of α-Linolenic Acid and Arachidonic Acid
Authors: Ernst Josef , Sheldrick William S. , Fuhrhop Jürgen-Hinrich 
Published: February 2015

Abstract
The essential fatty acids linoleic, α-linolenic and arachidonic acid have been crystallized for the first time. The crystal and molecular structures have been elucidated by X-ray analysis. Linoleic acid crystallizes monoclinic P21/c with a = 4298(3), b = 463.2(3), c = 937.7(6) pm, β = 109.38(8)°, Z = 4. The closely packed molecules are stretched with a tttttts̄CssCs̄tt conformationa. By comparison of the unit-cell constants and calculated densities of the unsaturated fatty acids it may be shown that both α-linolenic acid and arachidonic acid also possess stretched structures in the crystal lattice, α-linolenic acid must display a tttttts̄CssCs̄s̄Cs and arachidonic acid a tts̄CssCs̄s̄CssCs̄ttt conformation.
Nachbargruppeneffekte bei der Aminolyse von Estern, III. Der verlangsamende Einfluß von Triethylamin bei der Aminolyse von 2-(2-Hydroxybenzyl )phenylacetaten / Neighboring Group Effects in the Aminolysis of Esters, III. The Rate Diminishing Influence of Triethylamine in the Aminolysis of 2-(2-Hydroxybenzyl)phenylacetates
Authors: Böhmer Volker , Wörsdörfer Klaus 
Published: February 2015

Abstract
The rate of the aminolysis of 2-(2-hydroxybenzyl)phenylacetates with n-butylamine in dioxane is diminished by the addition of triethylamine. This can be quantitatively described by the competitive formation of complexes between monoacetate and n-butylamine or triethylamine, if the assumption is made, that the complex with triethylamine is aminolysed slowly or not at all. The neighboring group effect in aminolysis cannot be explained therefore by a base catalysed decomposition of the tetrahedral intermediate.
Zur Kenntnis einer neuen ternären Phase Cu0,5Nbl1,5O3,7 / About a New Phase Cu0,5Nbl1,5O3,7
Authors: Schweizer M. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of Cu0,5Nb1,5O3,7 were prepared and investigated by X-ray methods (a = 376.7, b = 507.3, c = 374,9 pm; β = 101.5°; space group: P21-C2
2). The statistically occupied metal positions (Nb/Cu) have a trigonal prismatic O2- surrounding.
Darstellung und spektroskopische Untersuchung von Trimethoxysilylpropylsulfanen / Synthesis and Spectroscopy of Silylsulfanes
Authors: Buder Wolfgang 
Published: February 2015

Abstract
The preparation of the sulfanes [(CH3O)3Si-(CH2)2-]2Sn (n=1-4) 2-5 and the corresponding mercaptane 1 is communicated. The 1H and 13C NMR spectra of 1-5 are reported and discussed. The infrared and Raman spectra are discussed in view of C-S-and S-S-bonding.
Protonenkatalysierte Synthese von Fluorochloro- und Fluorobromophosphiten / Synthesis of Fluorochloro- and Fluorobromophosphites by Proton Catalysis
Authors: Binder Herbert , Fischer Rudi 
Published: February 2015

Abstract
Dialkylmonofluorophosphites react with PCI3 or PBr3 to yield the title compounds 6 and 7. These reactions take place only in the presence of protic catalysts. As a working hypothesis, it is assumed that phosphorus is quinquevalent in the transition state. The 31P and 11F NMR data are tabulated.
Vanadocen-dichlorid - ein weiteres Antitumor-Agens aus der Metallocenreihe / Vanadocene Dichloride - Another Antitumor Agent from the Metallocene Series
Authors: Köpf-Maier Petra , Köpf Hartmut 
Published: February 2015

Abstract
The antitumor activity of vanadocene dichloride is investigated against Ehrlich ascites tumor in CFi mice. The application of 80 or 90 mg/kg 24 h after transplantation achieves 100% tumor inhibition until day 30. On treatment with higher doses death of an increasing number of animals is caused by substance toxicity.
The results of this study indicate that vanadocene dichloride exhibits antineoplastic properties similar to those found for titanocene dichloride and cis-dichlorodiammine-platinum(II).
Effect of Solvent, Leaving and Entering Ligand on Substitution Rates of Square Planar Complexes of Palladium(II) with 1 -(2-Hydroxyphenyl) -3,5-diphenylformazan
Authors: Balt S. , Meuldijk J. 
Published: February 2015

Abstract
Nucleophilic Substitution, Palladium(II), Formazan, 1-(2-hydroxyphenyl)-3,5-diphenylformazan, Solvent Effects, Substitution Reactions Nucleophilic substitution in different non-aqueous solvents at square planar complexes of palladium(II) with 1-(2-hydroxyphenyl)-3,5-diphenylformazan (H2Fo) according to FoPdX + Y → FoPdY + X, with X = ammonia and pyridine and Y = triphenylphos-phine, thiourea and the thiocyanate ion, obeys the rate law: rate = k1[FoPdX] + k2[FoPdX][Y]. Values of k1 and k2 were obtained at 25.0 °C. From measured solubilities and literature values of transfer functions the transfer chemical potentials for initial and transition state were calculated. A comparison of these quantities in different solvents leads to the conclusion that non-specific solvation effects are dominant in these compounds. The mutual dependence of the effects of leaving and entering ligands and solvent on the substitution rate indicates a level of synchronicity of bond-breaking and bond-making that is unusually high for palladium(II) complexes.
Condensation of 2-Acetyl-1,3-indandione with Amines and Diazonium Salts
Authors: Amer Fathy Abdel Kader , Afsah El-Sayed , Etman Hassan 
Published: February 2015

Abstract
2-Acetyl-1,3-indandione Derivatives, Amines, Diazonium Salts 2-Acetyl-1,3-indandione (1) undergoes the Mannich reaction with piperidine or diethyl-amine hydrochloride to give compounds 2 and 3, respectively. On treatment 1 with ethylenediamine hydrochloride and formaldehyde, 2,2′-[ethylene bis[imino(1-oxotri-methylene)]]di-1,3-indandione (4) was obtained.
With primary aromatic amines it yielded 2-[N-(substituted phenyl)acetimidoyl]-1,3-indandione (5a-i). The condensation of 1 with o-aminophenol yielded a mixture of 5c and the oxazepinone (6), while condensation with 2,3-diaminopyridine gave the diazepinone (7). Mannich reaction of 5a and g with piperidine hydrochloride and formaldehyde gave 8a, b. The coupling of 1 with diazonium salts was investigated.
Darstellung, IR-Spektrum und Kristallstruktur von [WNCI3 P0Cl3]4 2 POCI3 / Preparation, IR Spectra and Crystal Structure of [WNCl3 • P0Cl3]4 • 2 P0Cl3
Authors: Musterle Wilfried , Strähle Joachim , Liebelt Wolfgang , Dehnicke Kurt 
Published: February 2015

Abstract
Tungsten nitride chloride-POCl3 solvate, [WNCl3 • POCl3]4 • 2 POCl3 is prepared by the reaction of WNCI3 with excess POCI3. With equimolar amounts of POCI3 in dichloromethane suspension the complex [WNCI3 • POCl3]4 • 2 CH2CI2 is formed, which is easily decomposed leaving pure [WNCI3 • POCl3]4. The IR spectra of these complexes were recorded and assigned. A new preparative route to WNCI3 from tungsten hexachloride and iodine azide is described. [WNCI3 • POCl3]4 • 2 POCl3 crystallizes in the triclinic space group P1̅ with two tetrameric units per unit cell. The crystal structure was solved by X-ray diffraction methods (Å = 0,087; 3085 observed reflexions). The structure consists of planar and almost square W4N4-eight-membered rings with alternating W-N bond lengths. The distorted octahedral environment of the tungsten atoms is completed by three terminal Cl-ligands and by the oxygen atom of a POCI3 molecule, which is coordinated trans to the W = N triple bond. The two additional POCI3 molecules are weakly linked to two of the four POCI3 solvate molecules, giving rise to an increase of the W-O bond lengths to these donor groups
Synthesis and Characterisation of Bis(η5-methylcyclopentadienyl) N-Aryl-dithiocarbamato Chloro Titanium(IV) Compounds
Authors: Kaushik N. K. , Bhushan B. , Chhatwal G. R. 
Published: February 2015

Abstract
Some bis(η5-methylcyclopentadienyl) N-aryl-dithiocarbamato chloro titanium(IV) compounds of the general formula η5-(Mecp)2Ti(S2CNRH)Cl (R = phenyl; o-, m- and p-tolyl; p-methoxy phenyl; o- and p-ethoxy phenyl; o-, m- and p-chlorophenyl; p-bromophenyl and p-iodophenyl groups) have been prepared by the reaction of bis(η5-methylcyclopentadienyl) titanium(IV) dichloride with ammonium N-aryl-dithiocarbamates. A study of the molecular weight, conductance, infrared and electronic spectra, and magnetic susceptibility in addition to elemental analysis has been carried out to throw some light on the probable structure of these derivatives
Chemie polyfunktioneller Liganden, 53 [1] Über methyl-substituierte Triarsa-trioxa-, Triarsa-trithiaund Triarsa-triaza-adamantane und über den stark aufgeweiteten Adamantan-Käfig im Schwefel-Derivat / Chemistry of Polyfunctional Ligands, 53 [1] About Methyl-substituted Triarsa-trioxa-, Triarsa-trithia- and Triarsa-triaza-adamantanes and about the Strongly Spread Adamantane Cage in the Sulfur Derivative
Authors: Ellermann Jochen , Lietz Martin , Merbach Peter , Thiele Gerhard , Zoubek Gerd 
Published: February 2015

Abstract
The reaction of l,l,l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H2O, H2S and CH3NH2 in THF gives the adamantane cage compounds CH3C(CH2ASO)3 (4), CH3C(CH2ASS)3 (5) and CH3C(CH2ASNCH3)3 (6) in high yields. The crystal structure of 5 has been determinated by X-ray diffraction. The unit cell (space group P2i/w) contains 4 isolated molecules in a cubic closest packing. The heteroadamantane 5 has an enlarged cage structure with extremely spread C-C(H2)-As bond angles of 124° at the methylene carbon atoms. Some pharmacological properties of the adamantane derivatives 4 and 5 have been studied. All compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy.
Synthesis of Isoponcimarin
Authors: Rodighiero P. , Guiotto A. , Manzini P. 
Published: February 2015

Abstract
Synthesis of isoponcimarin, 7-(3'-methyl-2',3'-epoxy-butiloxy)-8-(3"-methyl-2"-oxobutyl) coumarin, a natural coumarin isolated from Poncirus trifoliata L., was obtained starting from acetyl osthenol. From the intermediate 7-acetoxy-8-(3'-methyl-2'-oxobutyl) coumarin, the coumarin derivatives isomeranzin and dihydrooroselone were also prepared
ESR and Optical Studies on the Interaction between cis-Dichlorodiammine Platinum(II) and Tryptophan
Authors: Neubacher Harald , Zaplatynski Peter , Haase Axel , Lohmann Wolfgang 
Published: February 2015

Abstract
cts-Dichlorodiammine platinum(II), which is known to be an active anticancer compound, and tryptophan form paramagnetic complexes in aqueous solution. These can be detected by means of electron spin resonance spectroscopy (ESR) after a reaction time of several hours. The ESR spectra are interpreted to be due to Pt(III) in a low spin d7 configuration. The optical results obtained are in accordance with the assumption of columnar structures of the paramagnetic complexes
Photolysereaktionen mit Komplexen des Typs CpFe(CO)2R (R = Me, Et, Ph)+ / Photolytic Reactions with Complexes of the Type CpFe(CO)2R (R = Me, Et, Ph)+
Authors: Alt H. G. , Herberhold M. , Edwards B. H. 
Published: February 2015

Photolysis of CpFe(CO)2R complexes [R = Me (1a), Et (1b), Ph (1c)] in hydrocarbon solvents results in loss of the group R and formation of the binuclear compound [CpFe(CO)2]2 (2). In the case of 1a, the photogenerated methyl group reacts to give methane by intramolecular hydrogen abstraction from the Cp ring, or by intermolecular hydrogen abstraction either from the solvent or another methyl group. The photoinduced dealkylation of the ethyl compound 1b is explained by β-elimination (to give ethylene) and subsequent reaction of the hydrido intermediates thus formed with unchanged 1b (to give ethane). The photolysis of 1c leads to phenyl groups which abstract hydrogen from the solvent to give benzene; a noticeable amount of diphenyl is also observed if benzene is used as a solvent.
In the presence of potential two-electron ligands L [L = PMe3, P(OMe)3], only the carbonyl groups of CpFe(CO)2Me (1a) are photolabile, and substituted derivatives of the type CpFe(CO)(L)Me [L = PMe3 (3a), P(OMe)3 (4a)] and CpFe(L)2Me [L = P(OMe)3 (5a)] are formed.
The photoinduced reaction of CpFe(CO)2Me (1a) and diphenylacetylene in solution gives metallocyclic derivatives containing either one or two diphenylacetylene units. On the basis of the IR, the 1H and 13C NMR, and the mass spectra, the complex CpFe(CO)(Ph2C2-COMe) (6a) is assigned a structure containing a vinyl-ketone unit in a five-membered metallocycle, while in CpFe(Ph4C4-COMe) (7a) a tetraphenylbutadienyl group appears to be incorporated into a seven-membered metallocycle
Funktionelle Trimethylphosphinderivate, XII Stabilisierte Carbanionen: Phosphinomethanide und ihre Reaktion mit Methyliodid /Functional Derivates of Trimethylphosphine, XII Stabilized Carbanions: Phosphinomethanides and their Reaction with Methyl Iodide
Authors: Karsch Hans Heinz 
Published: February 2015

Abstract
Phosphinomethanides {[(CH3)2P]nCH3-n}Li (n = 1, 2, 3) are obtained from the parent phosphines by reaction with organolithium reagents. The metalation is facilitated with increasing n. With methyl iodide reaction takes place at the phosphorus atom exclusively, yielding stabilized ylids for n = 2, 3.