Syntheses and crystal structures of [Sn{2-[(Me3Si)2C]C5H4N}R] [R = C6H2Pri3-2,4,6 1 or CH(PPh2)2 2], two novel heteroleptic tin(II) compounds derived from [Sn-{2-[(Me3Si)2C]C5H4N}Cl], and for [{Sn(C6H2Pri3-2,4,6)2}3] 3, a structural redetermination

Cardin, Christine J.; Cardin, D. J.; Constantine, S.; Drew, Michael G. B.; Rashid, Haroon; Convery, M.A.; Fenske, Dieter

doi:10.1039/a802172d

Cited by 27 publications

(24 citation statements)

References 29 publications

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“…[1] Due to the close proximity of the phosphorus and carbon donor atoms and their similar Pauling electronegativities of 2.19 and 2.55, [2] respectively, a variety of coordination modes of these ligands have been observed depending on the properties of the applied metal ion (radius, charge, electronegativity, polarizability), the substituents at phosphorus, and the neutral coligands present. [1] In mononuclear complexes, the κ 1 C, [3][4][5] κ 2 CP, [6,7] κ 2 PP [8][9][10] and κ 3 PCP [11][12][13] coordination modes shown in Scheme 1 are known.…”

Section: Introductionmentioning

confidence: 98%

Syntheses and Structures of Potassium Complexes Containing Bis(diphenylphosphanyl)methanide Anions

2014

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The reaction of [K{(Ph2P)2CH}(Et2O)0.5]n with an excess of tetrahydropyran yields polymeric [K{(Ph2P)2CH}(thp)]∞ (1). Application of neutral bidentate ligands such as dimethoxyethane or N,N,N′N′‐tetramethylethylenediamine leads to a splitting of the polymeric starting material into discrete dinuclear entities and the complexes [K{(Ph2P)2CH}(dme)]2 (3) and [K{(Ph2P)2CH}(tmeda)]2 (4) were isolated. In compounds 1, 3 and 4, the phosphorus atoms as well as the methanide carbon atom and two of the four phenyl groups of the anionic ligand participate in metal binding. Oligodentate ligands such as diglyme and 18‐crown‐6 enforce a reduction of the interaction between potassium and the diphosphanylmethanide anion and lead to the mononuclear complexes [K{(Ph2P)2CH}(diglyme)2] (5) and [{K{(Ph2P)2CH}(18C6)}{K{(Ph2P)2CH}(18C6)(thf)}] (6), respectively. In these compounds, only the phosphorus atoms of the diphosphanylmethanide ligands coordinate to the central potassium cation. The related lithium derivative [Li{(Ph2P)2CH}(thp)3] (2) was prepared for comparison. All complexes were characterized by NMR methods and X‐ray diffraction measurements.

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Section: Introductionmentioning

confidence: 98%

Syntheses and Structures of Potassium Complexes Containing Bis(diphenylphosphanyl)methanide Anions

2014

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“…All compounds were prepared according to published procedures, illustrated by Schemes and respectively; [E(2‐{(Me 3 Si) 2 C}‐C 5 H 4 N)L],2, 3 [E(η‐Cp s ) 2 ] (E = Ge,4 Sn27 or Pb28), [{E(η‐Cp s )(BF 4 )} 4 ]4 (E = Ge, Sn or Pb). With the exception of the preliminary steps involved during the syntheses of the organic ligands, rigorous air‐sensitive techniques were employed during the preparation of these highly reactive compounds.…”

Section: Methodsmentioning

confidence: 99%

“…For a number of years, we have been interested in the preparation and characterisation of low‐valent, organometallic derivatives of germanium, tin and lead and, to a lesser extent, silicon 1–4. Such compounds exhibit unusual reactivities, sometimes similar in nature to those of their related carbene analogues, the subject of increasing interest to organic and inorganic chemists.…”

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confidence: 99%

Electron impact and chemical ionisation mass spectrometry in the characterisation of organometallic silicon, germanium, tin and lead compounds

Constantine

Cardin

Bollen

2000

Rapid Commun. Mass Spectrom.

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The electron impact and chemical ionisation mass spectra of a number of organometallic derivatives of silicon, germanium, tin and lead, incorporating inter alia 2-bis(trimethylsilyl)methylpyridyl or cyclopentadienyl ligands have been recorded. Representative spectra are presented and illustrate the utility of these mass spectrometric techniques in the characterisation of such compounds, particularly so in light of the highly informative nature arising from their fragmentation patterns and the numerous isotopes of the nuclei involved. Copyright 2000 John Wiley & Sons, Ltd.

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“…In general, deprotonated bis(diphenylphosphino)methanes [Ph 2 PC(R)PPh 2 ] − as ligands can principally adopt three different binding modes. Thus, carbon binding (Scheme , a ) is only known for main group elements such as germanium,10 tin,11, 12 and lead 11. 13 Phosphorus coordination (Scheme , b ) is unknown when aryl substituents are present on the phosphorus atoms.…”

Section: Introductionmentioning

confidence: 99%

Highly Strained Heterometallacycles of Group 4 Metallocenes with Bis(diphenylphosphino)methanide Ligands

Haehnel

Hansen

Priebe

et al. 2013

Chemistry A European J

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A study of the coordination chemistry of different bis(diphenylphosphino)methanide ligands [Ph2PC(X)PPh2] (X = H, SiMe3) with Group 4 metallocenes is presented. The paramagnetic complexes [Cp2Ti{κ(2)-P,P-Ph2PC(X)PPh2}] (X = H (3 a), X = SiMe3 (3 b)) have been prepared by the reactions of [(Cp2TiCl)2] with [Li{C(X)PPh2}2(thf)3]. Complex 3 b could also be synthesized by reaction of the known titanocene alkyne complex [Cp2Ti(η(2)-Me3SiC2SiMe3)] with Ph2PC(H)(SiMe3)PPh2 (2 b). The heterometallacyclic complex [Cp2Zr(H){κ(2)-P,P-Ph2PC(H)PPh2}] (4 aH) has been prepared by reaction of the Schwartz reagent with [Li{C(H)PPh2}2(thf)3]. Reactions of [Cp2HfCl2] with [Li{C(X)PPh2}2(thf)3] gave the highly strained corresponding metallacycles [Cp2M(Cl){κ(2)-P,P-Ph2PC(X)PPh2}] (5 aCl and 5 bCl) in very good yields. Complexes 3 a, 4 aH, and 5 aCl have been characterized by X-ray crystallography. Complex 3 a has also been characterized by EPR spectroscopy. The structure and bonding of the complexes has been investigated by DFT analysis. Reactions of complexes 4 aH, 5 aCl, and 5 bCl did not give the corresponding more unsaturated heterometallacyclobuta-2,3-dienes.

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Syntheses and crystal structures of [Sn{2-[(Me3Si)2C]C5H4N}R] [R = C6H2Pri3-2,4,6 1 or CH(PPh2)2 2], two novel heteroleptic tin(II) compounds derived from [Sn-{2-[(Me3Si)2C]C5H4N}Cl], and for [{Sn(C6H2Pri3-2,4,6)2}3] 3, a structural redetermination

Cited by 27 publications

References 29 publications

Syntheses and Structures of Potassium Complexes Containing Bis(diphenylphosphanyl)methanide Anions

Syntheses and Structures of Potassium Complexes Containing Bis(diphenylphosphanyl)methanide Anions

Electron impact and chemical ionisation mass spectrometry in the characterisation of organometallic silicon, germanium, tin and lead compounds

Highly Strained Heterometallacycles of Group 4 Metallocenes with Bis(diphenylphosphino)methanide Ligands

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