4S)2)]NO3 ([2a]NO3). The Ni⋯Ir distance (av. 2.721 Å) is slightly longer than the Ni⋯Rh separation (av. 2.691 Å). The hydrido ligand of NiII(μ-H)IrIII complex ([2b]NO3) bears protic character and is stable in water above pH 2, which is contrasted to the fact that the hydrido ligand of NiII(μ-H)RhIII ([2a]NO3) has no protic character and is stable in water only above pH 6. The difference of the hydride
                                    水溶性双核
镍II
铱III复合物与桥接
氢化物,混合[Cp *的Ir(μ -H)的Ni(TsTACN(C 2 H ^ 4 S)2)] NO 3(TsTACN(C 2 H ^ 4 SH)2  = 1,4-双(2-巯基乙基)-7-
甲苯磺酰基-1,4,7-三氮杂中,Cp * =  η 5 -五
甲基环戊二烯基,[图2b ] NO 3,其通过双核
镍反应来合成),II
铱III络合物[Cp * Ir(NO 3)Ni(TsTACN(C 2 H 4 S)2)] NO 3([ 1b ] NO 3)与HCOONa的
水溶液。通过X射线分析明确确定[ 2b ] NO 3的结构,以便将其在
水性介质中的结构,性质和反应性与相应的
铑对应物[Cp * Rh(μ- H)Ni(TsTACN) (C 2 H 4 S)2)] NO 3([ 2a ] NO 3)。Ni⋯Ir距离(av.2.721Å)比Ni⋯Rh间隔(av.2.691Å)稍长。Ni