- Synthesis, characterisation and crystal structure of a novel nickel(II) phosphine complex, trans-[Ni2Cl4{cis-(Cy 2PCH2)2C6H4}2]
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The reaction of 1,3-C6H4(CH2PCy 2)2 with anhydrous nickel(II) chloride in dry THF produces the non-cyclometallated dinuclear complex trans-[Ni2Cl 4{cis-(Cy2PCH2/
- Johnson, Magnus T.,Wendt, Ola F.
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experimental part
p. 222 - 224
(2011/04/15)
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- O-Semiquinonic PCP-pincer nickel complexes with alkyl substituents: Versatile coordination sphere dynamics
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o-Semiquinonic nickel pincer complexes (R2PCP)Ni(SQ) show a versatile coordination sphere dynamics via swing or fan oscillations depending on the steric properties of the phosphorus substituents. The Royal Society of Chemistry.
- Kozhanov, Konstantin A.,Bubnov, Michael P.,Cherkasov, Vladimir K.,Vavilina, Nina N.,Efremova, Larisa Yu.,Artyushin, Oleg. I.,Odinets, Irina L.,Abakumov, Gleb A.
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p. 2849 - 2853
(2008/09/21)
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- Ti and Zr bidentate bis-phosphinimide complexes
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The diphosphines m-C6H4(CH2Pt-Bu2)2 1 and m-C6H4(CH2PCy2)2 2 were prepared and oxidized with Me3SiN3 to m-C6H4(CH2(t-Bu2)PNSiMe3) 2 3 and m-C6H4(CH2(Cy2) PNSiMe3)2 4, and subsequently converted to m-C6H4(CH2-(t-Bu)2PNH)2 5 and m-C6H4(CH2(Cy)2PNH)2 6. Reaction of 5 and 6 with Ti(NMe2)4 afforded the yellow compounds m-C6H4(CH2(t-Bu)2 PN)2Ti(NMe2)2 7 and m-C6H4(CH2(Cy)2PN)2 Ti(NMe2)2 8, and the low abundance by-product m-C6H4(CH2(t-Bu)2PN)2TiBr (NMe2) 9. In a similar manner, the species m-C6H4(CH2(t-Bu)2PN)2Zr(N Et2)2 10 was prepared from Zr(NEt2)4. Compounds 8, 9 and 10 were converted to C6H4(CH2(t-Bu)2PN)2 TiBr2 11, m-C6H4(CH2-(Cy)2PN)2 TiCl2 13 and C6H4(CH2(t-Bu)2PN)2 ZrCl2 14 via reaction with Me3SiX (X = Br, Cl). Alternatively, m-C6H4(CH2 (t-Bu)2PN)2TiCl2 12 and 13 were prepared in low yield from reaction of 3 or 4 with TiCl4. Alkylation of 11 with MeMgBr and PhCH2MgBr proceeded to give m-C6H4(CH2(t-Bu)2PN)2 TiMe2 15 and m-C6H4(CH2- (t-Bu)2PN)2Ti(CH2Ph)2 16, respectively. The species (m-C6H4(CH2 (t-Bu)2PN)2)2Zr 17 was prepared from Zr(CH2Ph)4. These synthetic routes are described and the implications for applications in olefin polymerization catalysis are considered. X-Ray structural data for compounds 1, 3, 4, 5, 8, 9 and 16 are reported.
- Hollink, Emily,Stewart, Jeffrey C.,Wei, Pingrong,Stephan, Douglas W.
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p. 3968 - 3974
(2007/10/03)
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