ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Contributions to the Chemistry of Phosphorus. 123. Synthesis and Properties of the Diphosphagermiranes (t-BuP)2GePh2 and (t-BuP)2GeEt2The first three-membered P2Ge heterocycles, 1,2-di-tert-butyl-3, 3-diphenyl-1, 2, 3-diphosphagermirane, (t-BuP)2GePh2 (1), and 1, 2-di-tert-butyl-3, 3-diethyl-1, 2, 3-diphosphagermirane, (t-BuP)2GeEt2 (2), were synthesized by [2+1] cyclocondensation reactions of K(t-Bu)P - P(t-Bu)K with diphenylgermanium dichloride and diethylgermanium dichloride, respectively. The four-, five-, and six-membered cyclogermaphosphanes (t-BuP)2(GePh2)2 (3), (t-BuP)3GeR2 (6 R = Ph; 7 R = Et), (t-BuP)4GePh2 (5) and (t-BuP)4(GePh2)2 (4) as well as (t-BuP)4 are formed as by-products. The diphosphagermiranes 1 and 2 could be isolated in 93 and 100% purity, respectively, and were unambiguously characterized as compounds with a cyclic P2Ge skeleton. The 31P-NMR parameters of the cyclogermaphosphanes 3 - 7 are reported.
Notes:
Die ersten P2Ge-Dreiring-Heterocyclen, 1,2-Di-tert-butyl-3,3-diphenyl-1,2,3-diphosphagermiran, (t-BuP)2GePh2 (1), und 1, 2-Di-tert-butyl-3,3-diethyl-1,2,3-diphosphagermiran, (t-BuP)2GeEt2 (2), wurden durch [2+1]-Cyclokondensation von K(t-Bu)P - P(t-Bu)K mit Diphenylgermaniumdichlorid bzw. Diethylgermaniumdichlorid synthetisiert. Als Nebenprodukte entstehen die vier-, fünf- und sechsgliedrigen Cyclogermaphosphane (t-BuP)2(GePh2)2 (3), (t-BuP)3GeR2 (6 R = Ph; 7 R = Et), (t-BuP)4GePh2 (5) und (t-BuP)4(GePh2)2 (4) sowie (t-BuP)4. Die Diphosphagermirane 1 und 2 konnten in 93- bzw. 100proz. Reinheit isoliert und eindeutig als Verbindungen mit P2Ge-Ringgerüst charakterisiert werden. Von den Cyclogermaphosphanen 3 - 7 werden die 31P-NMR-Parameter mitgeteilt.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19835030802
