Uni-, bi- and ter-dentate complexes formed from PPh2CH2C(R)NNHC(O)Ph (R = But or Ph) and Pd or Pt: crystal structures of [PdCl{PPh2CH2C(But)NNC(Ph)O}], [Pt{PPh2CHC(Ph)NNC(Ph)O}{PPh2CH2C(Ph)NNHC(O)Ph}] and [Pd{PPh2CHC(But)NHNC(O)Ph}2]
作者:Mustaffa Ahmad、Sarath D. Perera、Bernard L. Shaw、Mark Thornton-Pett
DOI:10.1039/b111079a
日期:2002.4.26
Treatment of the phosphino-N-benzoyl hydrazones PPh2CH2C(R)NNHC(O)Ph (R = But, I; R = Ph, II) with [MCl2(NCPh)2] (M = Pd or Pt) gave complexes of type [MClPPh2CH2C(But)NNC(Ph)O}] (M = Pd, 1; M = Pt, 2) containing two fused five-membered chelate rings. Metathesis with LiBr or NaI gave [MXPPh2CH2C(But)NNC(Ph)O}] (X = Br or I; M = Pd or Pt). The complex [PtMePPh2CH2C(But)NNC(Ph)O}] (8) was obtained by treating [PtMe2(cod)] (cod = cycloocta-1,5-diene) with one equivalent of I in hot benzene. Treatment of [PtMe2(cod)]
with two equivalents of the phosphine II gave [PtMePPh2CH2C(Ph)NNC(O)Ph}PPh2CH2C(Ph)NNHC(O)Ph] (11), containing a six-membered chelate ring and a unidentate coordinated ligand II. Treatment of [PtCl2(NCMe)2] with two equivalents of II in the presence of triethylamine gave [PtPPh2CHC(Ph)N–NC(Ph)O}PPh2CH2C(Ph)NNHC(O)Ph] (12), containing a terdentate (P,N,O-bonded) doubly deprotonated ene-hydrazone ligand and a unidentate ligand II. Prolonged treatment of [PdCl2(NCPh)2] with two equivalents of I in the presence of triethylamine gave [PdPPh2CHC(But)NHNC(O)Ph}2] (13),
containing two chelated phosphino ene-hydrazide ligands forming six-membered rings. A similar platinum complex, [PtPPh2CHC(But)NHNC(O)Ph}2] (14), was synthesised. The terdentate complexes of [MXPPh2CH2C(But)NNC(Ph)O}] (M = Pd, Pt; X = Cl, Me) underwent base-promoted (NEt3) Michael-type reactions with MeO2CCCCO2Me to give terdentate complexes of the type [MXPPh2CH[C(CO2Me)CH(CO2Me)]C(But)NNC(Ph)O}] (M = Pd, Pt; X = Cl, Me). The corresponding bromides and iodides were made by metathesis. The crystal structures of 1, 12 and 13 have been determined.
用 [MCl2(NCPh)2] (M = Pd 或 Pt) 处理膦基-N-苯甲酰腙 PPh2CH2C(R)NNHC(O)Ph (R = But, I; R = Ph, II) 得到以下类型的配合物[MClPPh2CH2C(But)NNC(Ph)O}] (M = Pd, 1; M = Pt, 2) 含有两个稠合的五元螯合环。与 LiBr 或 NaI 复分解得到 [MXPPh2CH2C(But)NNC(Ph)O}](X = Br 或 I;M = Pd 或 Pt)。络合物[PtMePPh2CH2C(But)NNC(Ph)O}](8)是通过在热苯中用一当量的I处理[PtMe2(cod)](cod=环辛-1,5-二烯)得到的。 [PtMe2(cod)]的处理
与两当量的膦 II 反应得到 [PtMePPh2CH2C(Ph)NNC(O)Ph}PPh2CH2C(Ph)NNHC(O)Ph] (11),含有六元螯合环和单齿配位配体 II。在三乙胺存在下用两当量的 II 处理 [PtCl2(NCMe)2] 得到 [PtPPh2CHC(Ph)N–NC(Ph)O}PPh2CH2C(Ph)NNHC(O)Ph] (12),含有三齿(P,N,O-键合)双去质子烯-腙配体和单齿配体II。在三乙胺存在下,用两当量的 I 长时间处理 [PdCl2(NCPh)2] 得到 [PdPPh2CHC(But)NHNC(O)Ph}2] (13),
含有两个形成六元环的螯合膦烯酰肼配体。合成了类似的铂络合物[PtPPh2CHC(But)NHNC(O)Ph}2] (14)。 [MXPPh2CH2C(But)NNC(Ph)O}] (M = Pd, Pt; X = Cl, Me) 的三齿配合物与 MeO2CCCCO2Me 进行碱促进 (NEt3) Michael 型反应,得到三齿配合物类型 [MXPPh2CH[C(CO2Me)CH(CO2Me)]C(But)NNC(Ph)O}](M = Pd、Pt;X = Cl、Me)。通过复分解制备相应的溴化物和碘化物。 1、12和13的晶体结构已确定。