V. Peron et al., SYNTHESIS OF MIXED BIS(ALKENYLCARBENE) DITUNGSTEN COMPLEXES BY SEQUENTIAL ACTIVATION OF DIALKYNOLS, Journal of organometallic chemistry, 539(1-2), 1997, pp. 201-203
The synthesis of new bis(alkenylcarbene) ditungsten complexes 2a-b, 5a
and 6a has been achieved from W(CO)(5)(THF), via activation of the di
alkynol derivatives a and b. The reaction of 5a with piperazine afford
s a dissymmetric bis(aminocarbene) complex 7a. (C) 1997 Elsevier Scien
ce S.A.