[(DmpSe)Ru(PR 3)] + BAr F 4 –(DmpSe = 2,6-二苯二甲硒基苯硒酸酯,Ar F的类型的单核束缚钌(II)配合物的制备和结构表征描述了= 3,5-双(三氟甲基)苯基。与已知的相关硒酸盐络合物不同,所报道的络合物家族是具有单个单齿硒酸盐配体的阳离子。研究了这些络合物在Ru-Se键上参与Si-H键协同活化的能力,并通过多核NMR光谱和X射线衍射对氢化硅烷加合物进行了充分表征。评估了这些配合物作为各种离子脱氢甲硅烷基化和氢化硅烷化反应的催化剂的有用性。在所有阶段,将新的配合物与其硫醇盐同系物[(DmpS)Ru(PR 3)] + BAr F 4 –(DmpS = 2,6-二甲磺基苯硫醇酯)。硒酸酯和硫醇酸酯配合物之间的差异很小,但是可以测量。较大的硒原子在Ru-Se键周围提供的空间比硫在Ru-S键处提供的空间更大,因此,硒酸酯络合物可以容纳空间上要求更高的氢硅烷。
Enthalpies of Reaction of ((p-cymene)RuCl2)2 with Monodentate Tertiary Phosphine Ligands. Importance of Both Steric and Electronic Ligand Factors in a Ruthenium(II) System
作者:Scafford A. Serron、Steven P. Nolan
DOI:10.1021/om00010a027
日期:1995.10
The enthalpies of reaction of ((p-cymene)RuCl2)(2) (p-cymene = (CH3)(2)CH(C)6H(4)CH(3)) with a series of tertiary phosphine ligands, leading to the formation of (p-cymene)RuCl2(PR(3)) complexes (PR(3) = tertiary phosphine) have been measured by solution calorimetry in CH2-Cl-2 at 30 degrees C. The range of reaction enthalpies spans some 22 kcal/mol. The overall relative order of stability established is as follows (PR(3);-Delta H, kcal/mol): P(p-CF3C6H4)(3) < PCy(3) < PCy(2)Ph < P(p-ClC6H4)(3) < P(OPh)(3) < (PPr3)-Pr-i < PPh(3) < P(P-FC6H4)(3) < P(P-CH3C6H4)(3) < PCyPh(2) < P(P-CH3OC6H4)(3) < P(i)Bu(3) < PBz(3) < PPh(2)Et < PPh(2)Me < P(OMe)(3) < PEt(3) < PPhMe(2) < PMe(3). A quantitative analysis of ligand effect of the present data helps clarify the exact steric versus electronic ligand contributions to the enthalpy of reaction in this system. Both steric and electronic factors appear to play an important role in dictating the magnitude of the enthalpy of reaction.
Use of Perfluorinated Phosphines to Provide Thermomorphic Anticancer Complexes for Heat-Based Tumor Targeting
作者:Anna K. Renfrew、Rosario Scopelliti、Paul J. Dyson
DOI:10.1021/ic9020433
日期:2010.3.1
A series of compounds of general formula [Ru(eta(6)-arene)(pta)(PR3)Cl]BF4 (arene = p-cymene or 4-phenyl-2-butanol; pta = 1,3,5-triaza-7-phosphatricyclo[3.3.1.1]decane, PR3 = PPh2(p-C6H4C2H4C8F17), PPh(p-C6H4C2H4C8F17)(2), P(p-C6H4C2H4C6F13)(3), PPh3 or P(p-C6H4F)(3)) have been prepared and characterized by spectroscopic methods. The structure of [Ru(eta(6)-p-cymene)(pta)Cl(P(p-C6H4F)(3))]BF4 has also been established in the solid state by X-ray crystallography. The cytotoxicities of the compounds were determined in the A2780 and A2780 cisplatin-resistant cell lines revealing that the fluorinated phosphines significantly increase antiproliferative activity relative to their bis-chloride precursors. Two of the complexes were found to be thermoresponsive, that is, showing poor water solubility at 37 degrees C and good solubility at 42 degrees C, the temperature of a heated tumor, providing a method of tumor targeting. Incubation at 42 degrees C for 2 h resulted in improved cytotoxicities for two of the complexes.