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Transition Metal‐Substituted Arsaalkenes, II. Synthesis, Structure and Reactivity of the Arsaalkenes RAs=C(NMe 2 ) 2 [R = Me 3 Si, (η 5 ‐C 5 Me 5 )(CO) 2 Fe] and the 1,2‐Dihydroarsete (η 5 ‐C 5 Me 5 )(CO) 2 ‐Fe
Author(s) -
Weber Lothar,
Kaminski Olaf,
Stammler HansGeorg,
Neumann Beate
Publication year - 1996
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.19961290217
Subject(s) - chemistry , reactivity (psychology) , transition metal , nuclear magnetic resonance spectroscopy , mass spectrometry , x ray crystallography , metal , salt (chemistry) , crystallography , spectroscopy , medicinal chemistry , stereochemistry , diffraction , organic chemistry , catalysis , medicine , physics , alternative medicine , pathology , chromatography , quantum mechanics , optics
Abstract Reaction of equimolar amounts of thiuronium salt [(Me 2 N) 2 C‐SMe]I ( 1 , with LiAs(SiMe 3 ) 2 · 2 THF ( 2 ) afforded arsaalkene Me 3 SiAs=C(NMe 2 ) 2 ( 3 ). Combination of 3 with (η 5 ‐C 5 Me 5 )(CO) 2 FeBr led to the formation of (η 5 ‐C 5 Me 5 )(CO) 2 ‐FeAs=C(NMe 2 ) 2 ( 4 ). Reaction of the latter with dimethyl fumarate gave the 1,2‐dihydroarsete (η 5 ‐C 5 Me 5 )(CO) 2 ‐Fe ( 6 ). Compounds 3, 4 , and 6 were characterized by means of spectroscopy (IR, 1 H, 13 C{ 1 H}, 29 Si{ 1 H} NMR and mass spectrometry). The molecular structures of 4 and 6 were determined by X‐ray diffraction analysis.