名称:
Condensation reactions of the mononuclear nickel(II) complexes [RN(PPh 2 ) 2 ]NiCl 2 with 1,2-ethanedithiol or 1,3-propanedithiol
摘要:
A series of the mononuclear nickel(II) complexes 5-16 with N-substituted bis(diphenylphosphanyl) amine RN(PPh2)(2) has been prepared and structurally characterized. Treatment of NiCl2 center dot 6H(2)O with RN(PPh2)(2) [R = CH2Ph, 1; CH(CH3)(2), 2; CH2CH2CH2CH3, 3; CH2CH(CH3)(2), 4] in CH2Cl2/MeOH afforded the mononuclear nickel(II) dichloride complexes [RN(PPh2)(2)]NiCl2 [R = CH2Ph, 5; CH(CH3)(2), 6; CH2CH2CH2CH3, 7; CH2CH(CH3)(2), 8] in 66-71% yields. Further treatment of [RN(PPh2)(2)]NiCl2 with 1,2-ethanedithiol or 1,3-propanedithiol in the presence of triethylamine in CH2Cl2 produced the mononuclear nickel(II) dithiolate complexes [RN(PPh2)(2)] Ni(SCH2CH2S) [R = CH2Ph, 9; CH(CH3)(2), 10; CH2CH2CH2CH3, 11; CH2CH(CH3)(2), 12] and [RN(PPh2)(2)] Ni(SCH2CH2CH2S) [R = CH2Ph, 13; CH(CH3)(2), 14; CH2CH2CH2CH3, 15; CH2CH(CH3)(2), 16] in 41-74% yields, respectively. All the complexes 5-16 have been characterized by H-1 NMR, P-31{H-1} NMR, C-13{H-1} NMR and high resolution MS spectroscopy, and for 3, 4, 6, 9-12 by X-ray crystallography. (C) 2014 Elsevier B.V. All rights reserved.