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. 82. About the Alkyl Cyclodicarba Triphosphanes (PR)3C2H4 [R = CH3, C2H5, t-C4H9] and (PC2H5)3C2H3CH3The alkyl-substituted cyclodicarba triphosphanes (PR)3C2H4 (R = CH3 1, C2H5 2, t = C4H9 3) and (PC2H5)3C2H3CH3 4 are obtained by the reaction of the corresponding dipotassium alkylphosphides K—(PR)n—K (n = 3,4) with 1,2-dichloroethane and 1,2-dichloropropane respectively. Besides, the homocyclic rings (PR)n (n = 5,4) characteristic for the given substituent and in the case of R = t-C4H9 the six-membered ring compound (t-C4H9P)4C2H4 are formed. For the alkyl cyclodicarba triphosphanes 1, 2 and 4 two configuration isomers could be identified; the „all-trans“-forms are always predominant. The 31P nmr parameters of the various configuration isomers are reported, and the conformation is discussed.
Notes:
Die alkylsubstituierten Cyclodicarba-triphosphane (PR)3C2H4 (R = CH3 1, C2H5 2, t-C4H9 3) und (PC2H5)3C2H3CH3 4 werden durch Reaktion der entsprechenden Dikaliumalkylphosphide K—(PR)n—K (n = 3, 4) mit 1,2-Dichloräthan bzw. 1,2-Dichlorpropan erhalten. Daneben entstehen die für die jeweiligen Substituenten charakteristischen Homocyclen (PR)n (n = 5,4) sowie im Fall von R = t-C4H9 die Sechsringverbindung (t-C4H9P)4C2H4. Von den Alkylcyclodicarba-triphosphanen 1, 2 und 4 konnten jeweils zwei Konfigurationsisomere identifiziert werden; die „all-trans“-Formen überwiegen stets. Die 31P-NMR-Parameter der einzelnen Konfigurationsisomere werden mitgeteilt und ihre Konformationen diskutiert.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19794560101
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