Hydrocarbon bridged metal complexes XLV. Dinuclear polyene-bridged Fischer carbene complexes and a star-shaped benzene-bridged tris(ferrocenyl-decapentaenyl) compound

摘要

Condensation of carotinoid polyene dialdehydes, 1,1'-ferrocene dialdehydes and of 9-ferrocenyl-2,7-dimethylnonatetraenal with the Fischer carbene complexes (OC)_5W=C(NMe_2)CH_2SiMe_3 or (OC)_5M=C(Me)(OMe) (M = Cr, W) in the presence of n-BuLi or SiMe_3Cl/NEt_3 yields the bis(carbene) complexes 1-4 and the donor acceptor substituted complexes 5, 6. The star-shaped trinuclear molecules 7 and 8 were obtained under Wittig conditions from 1,3,5-tris[(triphenylphosphonio)methyl]benzene tribromide and ferrocene aldehyde or 9-ferrocenyl-2,7-dimethyl-nonatetraenal.