Abstract
The reaction between Ru2(ap)4Cl (ap = 2-anilinopyridinate) and LiC≡C-4-Ph-P(O)(OtBu)2 afforded Ru2(ap)4-C≡C-4-Ph-P(O)(OtBu)2 (1), which was further reacted with LiC≡C-4-Ph-S(CH2)2SiMe3 to yield trans-(4-Me3Si(CH2)2S-Ph-C≡C)-Ru2(ap)4-C≡C-4-Ph-P(O)(OtBu)2 (2). trans-Ru2(DMBA)4(C≡C-4-Ph-P(O)(OtBu)2)2 (3; DMBA = N,N′-dimethylbenzamidinate) was obtained from the reaction between Ru2(DMBA)4(NO3)2 and either HC≡C-4-Ph-P(O)(OtBu)2 in the presence of Et3N or LiC≡C-4-Ph-P(O)(OtBu)2. Compounds 1–3 were characterized by HR-MS, X-ray diffraction, and voltammetric techniques, which revealed the retention of essential characteristics in molecular and electronic structures upon the phosphonate capping.
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