Synthesis of Some Pentacoordinated Germanium Compounds

Feng, Xue Tao; Cui, Sheng; Cao, Ru Zhen; Liu, Lun Zu

doi:10.1515/mgmc.1997.20.4.213

Cited by 5 publications

(5 citation statements)

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“…The Ge−O bond lengths are shorter than that observed by Denmark et al in anionic pentacoordinate complexes (1.994 Å) but significantly shorter than the sum of the van der Waals radii (3.75 Å). , The observed Ge−S bond length in 1 is significantly shorter than that reported by Dräger , and co-workers for neutral pentacoordinate germanium complexes (3.005 Å) . Ge−S Bond lengths ranging from 2.250 to 2.343 Åwere reported by Holmes et al for an anionic rectangular pyramidal germanium complex …”

Section: Resultsmentioning

confidence: 51%

A Neutral Spirocyclic Hexacoordinated Germanium(IV) Complex: Hypervalent Germanium Compounds with Sulfur-Containing Eight-Membered Rings

Pastor¹,

Huang²,

Nabirahni³

et al. 1997

Inorg. Chem.

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X-ray analysis of the complex [2,2‘-S-(4,6-tBu2C6H2O)2]2Ge reveals a hexacoordinated Ge atom with bonding of the transannular sulfur atoms in the eight-membered rings to germanium. An octahedral geometry about Ge is observed. 1H NMR spectral data are consistent with the hexacoordinate structure being maintained in solution. This six-coordinate Ge complex provides a model for the possible bonding and structure of TS's and intermediates in nucleophilic substitution reactions at Ge.

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Section: Resultsmentioning

confidence: 51%

A Neutral Spirocyclic Hexacoordinated Germanium(IV) Complex: Hypervalent Germanium Compounds with Sulfur-Containing Eight-Membered Rings

Pastor¹,

Huang²,

Nabirahni³

et al. 1997

Inorg. Chem.

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“…Thus, E. Lukevics and coworkers found [62] that dihydrogermanes can be used successfully as the initial germanium-containing compounds for the synthesis of germocanes. A germocane containing a phosphorus atom in the eight-membered ring was obtained by the reaction of the disodium derivative of P-phenyldiethanolphosphine with dimethyldibromogermane [78]. The instability of this compound is stressed.…”

Section: Reaction Of Trimethylsilyl Ethers Of Dialkanolamines With Hamentioning

confidence: 99%

“…aminomethylphosphonate in the presence of triethylamine led to the formation of spirogermocanes according to the equation presented below[78].…”

mentioning

confidence: 99%

Metallocanes of group 14 elements. 1. Derivatives of silicon and germanium. (Review)

Selina

Karlov

Зайцева

2006

Chem Heterocycl Compd

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Results on the synthesis of silocanes and germocanes, eight-membered heterocycles with the general formula D(CH 2 CH 2 Z) 2 MXY are analyzed and classified. The chemical behavior of these compounds and the characteristics of the element-nitrogen transannular bond are studied.Metallocanes include eight-membered heterocyclic compounds with the general formula D(CH 2 CH 2 Z) 2 MX k Y n (k, n = 0-2), in which transannular interaction is possible between the atom of the metal (metalloid) M and the heteroatom D containing an unshared electron pair. Such derivatives are known for a large number of elements (M = B, Si, Ge, Sn, Pb, As, Sb, Bi, transition metals). Among the compounds formed by the atoms of nontransition elements the metallocanes of group 14 (mainly derivatives of silicon and germanium) have been investigated most.In the present article the currently available data on the synthesis and reactivity of silocanes and germocanes and on the physicochemical investigation of the compounds are reviewed. The review includes data on compounds in which the central group 14 atom forms four covalent bonds and is capable of forming one or two additional intramolecular hypervalent interactions. A major contribution to the development of the chemistry of these derivatives was made by several research groups led by E. Lukevics, M. Voronkov, V. Mironov, V. D'yakov, A. Tzschach and K. Jurkschat, J. Corey, M. Gilen, R. Holmes, and M. Dräger. It is also necessary to mention a recent review on the metallocanes of heavy elements of groups 14 and 15 [1].

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“…The information concerning germocanes, RN(CH 2 CH 2 O) 2 -Ge(X)Y -closely related analogues of germatranes -is rather limited [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. However, one might expect that germocanes possess greater chemical and structural flexibility since they have more possibilities to vary substituents R, X, and Y and, hence, to modulate the effect that these groups have on the transannular Ge N bond strength.…”

Section: Introductionmentioning

confidence: 99%

“…Most of them represent the reaction between dialkanolamines and suitable germanium derivatives [13,[18][19][20][22][23][24][25][26][27][28]. A different approach, viz., the reaction of GeHal 4 with trimethylsilyl ethers of diethanolamines, RN(CH 2 CH 2 OSiMe 3 ) 2 , leading to the corresponding 2,2-dihalogermocanes, was used by us [28] and others [15].…”

Section: Introductionmentioning

confidence: 99%

The transannular interaction germanium–nitrogen in germocanes: The influence of substituents

Lermontova

Selina

Karlov

et al. 2006

Journal of Organometallic Chemistry

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Synthesis of Some Pentacoordinated Germanium Compounds

Cited by 5 publications

References 0 publications

A Neutral Spirocyclic Hexacoordinated Germanium(IV) Complex: Hypervalent Germanium Compounds with Sulfur-Containing Eight-Membered Rings

A Neutral Spirocyclic Hexacoordinated Germanium(IV) Complex: Hypervalent Germanium Compounds with Sulfur-Containing Eight-Membered Rings

Metallocanes of group 14 elements. 1. Derivatives of silicon and germanium. (Review)

The transannular interaction germanium–nitrogen in germocanes: The influence of substituents

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