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ortho-Phenyl-substituted ethoxy- and aminocarbene pentacarbonyltungsten complexes 2a-c and 3a-c are synthesized and the latter are reacted with chloromethylenephosphane 4 in diethyl ether in the presence of triethylamine to yield the ortho-phenyl-substituted 2H-azaphosphirene complexes 6a-c via elimination of triethylammonium chloride; remarkable are the prolonged reaction times in the case of the...
Partial decomplexation of 2H-1,4,2-diazaphosphole and 2H-1,2-azaphosphole complexes is observed upon prolonged heating in benzonitrile; the liberated heterocycles were detected spectroscopically, but could not be isolated. The first 2H-1,3,2-diazaphosphole derivative, formed by thermal decomplexation using o-xylene and 1,2-bis(diphenylphosphino)ethane, was isolated and characterized. In all three...
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