Copper(i) complexes of cis,cis-1,3,5-tris(mesitylideneamino)cyclohexane ligands: synthesis, structure and substrate selectivity
作者:Michael Cushion、Parisa Ebrahimpour、Mairi F. Haddow、Andrew J. Hallett、Stephen M. Mansell、A. Guy Orpen、Duncan F. Wass
DOI:10.1039/b818827k
日期:——
The new sterically encumbered facially coordinating N3-donor ligand cis,cis-1,3,5-tris(mesitylideneimino)cyclohexane (L1) has been synthesised. Reaction with [Cu(NCCH3)4]PF6 gives [Cu(L1)NCCH3]PF6 (1), the bound acetonitrile being labile and readily replaced by CO to yield [Cu(L1)CO]PF6 (2); both 1 and 2 have been structurally characterised. Complexes 1 and 2 do not undergo a substitution reaction with ethylene. This is in contrast to the related bidentate ligand complexes [Cu(L2)NCCH3]BF4 (3) or [Cu(L2)CO]BF4 (4) (L2 = 1,2-bis(mesitylideneamino)cyclohexane) which rapidly form the ethylene complex under the same conditions.
新合成了一个具有立体阻碍的面式配位的N3供体配体顺式,顺式-1,3,5-三(茂基亚胺基)环己烷(L1)。与[Cu(NCCH3)4]PF6反应得到[Cu(L1)NCCH3]PF6(1),其中键合的乙腈易于被CO取代,生成[Cu(L1)CO]PF6(2);两者均已通过结构表征。配合物1和2不与乙烯发生取代反应。这与此类双齿配体配合物[Cu(L2)NCCH3]BF4(3)或[Cu(L2)CO]BF4(4)(L2=1,2-双(茂基氨基)环己烷)在相同条件下迅速形成乙烯配合物形成了鲜明对比。