Heptahexaenylidene Complexes : Synthesis and Characterization of the First Complexes with an M=C=C=C=C=C=C=CR 2 Moiety (M = Cr, W)
Heptahexaenylidene Complexes : Synthesis and Characterization of the First Complexes with an M=C=C=C=C=C=C=CR 2 Moiety (M = Cr, W)
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七六烯基配合物:具有 M=C=C=C=C=C=C=CR 2 部分 (M = Cr, W) 的第一个配合物的合成和表征
DOI:
10.1021/om700386t
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发表时间:
2007
期刊:
影响因子:
2.8
通讯作者:
H. Fischer
中科院分区:
文献类型:
--
作者:
M. Dede;M. Drexler;H. Fischer
Silica-induced elimination of dimethylamide from [(CO)5M(C⋮C)3C(NMe2)3]- [M = Cr (4a), W (4b)] affords the first isolated and characterized heptahexaenylidene complexes [(CO)5MCCCCCCC(NMe2)2] (5a,b). Complexes 4a,b were generated by sequential reaction of Me3Si(C⋮C)3SiMe3 with LiMe·LiBr, [(Me2N)3C]+Cl-, LiBu, and [(CO)5M(thf)]. Complex 5b is inert in methanol, but adds dimethylamine across the C5C6 bond to give [(CO)5WCCCCC{CHC(NMe2)2}NMe2]. The reaction of 5a,b with LiMe·LiBr and SiO2 generates the heptahexaenylidene complexes [(CO)5MCCCCCCC(Me)NMe2] (8a,b). Trapping of 8b with HNMe2 yields pentatetraenylidene complex [(CO)5WCCCCC{CHC(Me)NMe2}NMe2].