185699-79-0Relevant academic research and scientific papers
Ti and Zr complexes of ferrocenyl amidinates
Multani, Kanwarpal,Stanlake, Louisa J. E.,Stephan, Douglas W.
, p. 8957 - 8966 (2011/01/09)
Preparation of a N-ferrocenyl-amidinate complex was achieved by employing (TMEDA)Li[(CpFeC5H4)NC(Ph)NSiMe3] (1) to prepare Cp*Zr[(CpFeC5H4)NC(Ph)NSiMe 3]Cl2 (2). Complex 2 exhibited poor polymerization activity and thus a series of C-ferrocenyl bis(amidinate) complexes of the type M(L)2Cl2 (M = Zr, 4; M = Ti, 5; L = (CyNC(CpFeC 5H4)NCy) were synthesized via reaction of ferrocenyl-amidine, H(L) and M(NMe2)2Cl2 (M = Ti, Zr·2THF). Half sandwich mono(amidinate) complexes, Cp′ZrLCl2 (Cp′ = Cp, 7; Cp′ = Cp*, 8), were prepared by the reaction of Cp′ZrCl3 with Li(L) and subsequently alkylated to give M(L)2Me2 (M = Zr, 9; M = Ti, 11), CpZr(L)(CH2Ph)2 (12) and Cp*Zr(L)Me 2 (10) with the appropriate alkylating agent. Abstraction of a methyl group from 7 with B(C6F5)3 and [Ph 3C][B(C6F5)4] proceeded cleanly to give [{CyNC(CpFeC5H4)NCy}2ZrMe][MeB(C 6F5)3] 13 and [{CyNC(CpFeC5H 4)NCy}2ZrMe][B(C6F5)4] 14, respectively. Similarly, the analogous CpZr and Cp*Zr derivatives LZr{CyNC(CpFeC5H4)NCy}CH2Ph] [PhCH 2B(C6F5)3] L = Cp 15, Cp* 17 and [LZr{CyNC(CpFeC5H4)NCy}CH2Ph][B(C 6F5)4] L = Cp 16, Cp* 18 were prepared. Cyclic voltammetry studies on the metal complexes containing ferrocenyl-amidinates reveal quasi reversible oxidation and reduction waves for the ferrocene/ferrocenium couple. The dichloride complexes (4-8) activated with MAO and dialkyl complexes (9,10) activated with B(C6F 5)3 and [Ph3C][B(C6F 5)4] showed low ethylene polymerization activities. The Royal Society of Chemistry 2010.
Synthesis, reactivity, and crystal structures of ferrocene-substituted amidinate derivatives
Hagadorn, John R.,Arnold, John
, p. 521 - 530 (2007/10/03)
Reaction of FcLi (Fc=ferrocenyl) with DCC (DCC=l,3-dicyclohexylcarbodiimide), followed by the addition of water, yields the ferrocene-containing amidine Fc(NCy)NHCy in 50% yield. The amidine is readily deprotonated by LiN(SiMe3)2 or
