6533b851fe1ef96bd12a974e

RESEARCH PRODUCT

Über gemischte gruppe 14-gruppe 14-bindungen

Manfred MathesDietolf SimonMartin DrägerMichael Charissé

subject

SiliconStereochemistryChemistryChemical shiftOrganic Chemistrychemistry.chemical_elementGermaniumCrystal structureBiochemistryInorganic ChemistryElectronegativityCrystallographysymbols.namesakeX-ray crystallographyMaterials ChemistrysymbolsMoleculePhysical and Theoretical ChemistryRaman spectroscopy

description

Abstract The six title compounds have been synthesized from Li/KSi/GePh 3 and chloride precursors in THF, DME or diethyl ether at low temperature. The six compounds crystallize isomorphously in the space group Pbca with ordered arrangement for the four symmetrical cases (SiSi 2.394, SiGe 2.412, GeGe 2.440 A) and statistical alignment for the two asymmetrical chains; angle range 116.5–123.3°. Replacement of Si by Ge atoms leads to low field NMR chemical shifts for 13 C ipso atoms and for directly bonded 29 Si atoms. This is in accordance with an enhanced electronegativity of germanium in comparison with silicon. UV/Vis and IR/Raman data are given.

yearjournalcountryeditionlanguage
1993-02-01Journal of Organometallic Chemistry
https://doi.org/10.1016/0022-328x(93)80184-d