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Halogen(Silyl)phosphane – Synthese und Eigenschaften
Author(s) -
Treubel Rainer,
Niecke Edgar
Publication year - 1990
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19901230606
Subject(s) - chemistry , halogen , lewis acids and bases , silylation , nucleophilic substitution , trimethylsilyl , medicinal chemistry , nucleophile , derivative (finance) , reagent , allene , stereochemistry , organic chemistry , catalysis , alkyl , financial economics , economics
Halogeno(si1yl)phosphanes ‐ Synthesis and Properties Bis(trimethylsilyl)phosphanes 1a – d react with hexachloroethane to give chloro(trimethylsily)phosphanes 2a – d . The decomposition of these compounds to cyclophosphanes is found to be catalized by Lewis acids and bases. Nucleophilic substitution of the P ‐chloro function of 2c leads to the bromo( 9a ), iodo‐ ( 9b ) and azido derivative ( 10a ). Methanolysis of 2a – d leads to tye secondary chlorophosphanes 11a – d .Reaction of 2a – e with chloromethylenephosphane 12a results in the formation of 1‐chlorodiphosphiranes 16a – e via a 1,2‐diphospha‐2‐propene intermediate 14 . The 1‐bromo‐( 19a ) and 1‐iododiphosphirane 19b is accessible from 16c by exchange reaction with the corresponding halosilanes. The potential of halo(sily)phosphanes as phosphanediyl transfer reagents was unhindered in the reaction of 2c with different substituted phosphaalkenes 28a – d to the corresponding diphosphiranes 29a – d .