The reaction of [Ru(CO)2Cl(terpy)]PF6 (terpy = 2,2′∶6′∶2′′-terpyridine) with Na2mnt (mnt = S2C2(CN)2) initially produced [Ru(CO)2(mnt-κS)(terpy-κ3NN′N′′)] 1a, which rearranged to [Ru(CO)2(mnt-κ2SS′)(terpy-κ2NN′)] 1b in solution. The molecular structures of 1a and 1b indicate that the rearrangement proceeds via a five-coordinated complex with monodentate mnt and bidentate terpy. The reaction of [Ru(CO)2Cl(terpy)]PF6 with 3,4-toluenedithiol (H2tdt) gave [Ru(CO)2(tdt-κ2SS′)(terpy-κ2NN′)] 2b but [Ru(CO)2(tdt-κS)(terpy-κ3NN′N′′)] 2a was not identified. Thus, ruthenium complexes with bidentate dithiolene and bidentate terpyridine seem to be more stable than those with monodentate dithiolene and tridentate terpyridine. Neither [Ru(CO)2(pdt-κS)(terpy-κ3NN′N′′)] 3a nor [Ru(CO)2(pdt-κ2S)(terpy-κ2NN′)] 3b (pdt = PhC(S)C(S)Ph) was obtained in the reaction of [Ru(CO)2Cl(terpy)]PF6 with the Cs+ salt of pdt2− in CH3OH under N2. The same reaction conducted under aerobic conditions afforded [Ru(CO)(C(O)OCH3)(SC(Ph)C(Ph)SC(O)OMe)(terpy-κ3NN′N′′)] 3 resulting from double addition of CO2 and CH3OH to the terminal sulfur of pdt and a carbonyl carbon of 3a, respectively, followed by esterification of the resultant [Ru(CO)(C(O)OCH3)(SC(Ph)C(Ph)SC(O)OH)(terpy-κ3NN′N′′)] in CH3OH. The addition of CO2 to the sulfur of 3a is ascribed to the strong basicity and weak chelating ability of pdt compared with those of mnt and tdt. A series of [RuX(dithiolene)(terpy)]n+ (X = dmso, Cl or OSO2CF3; n = 0 or 1) were also prepared.
[Ru(CO)2Cl(terpy)]PF6(terpy = 2,2′∶6′∶2′′-
吡啶)与Na2mnt(mnt = S2C2(CN)2)的反应最初生成了[Ru(CO)2(mnt-κS)(terpy-κ3NN′N′′)] 1a,该化合物在溶液中重排成[Ru(CO)2(mnt-κ2SS′)(terpy-κ2NN′)] 1b。1a和1b的分子结构表明,重排过程经过一个五配位的复杂体,其中有单齿的mnt和双齿的terpy。将[Ru(CO)2Cl(terpy)]PF6与3,4-二
硫代
苯甲醇(H2tdt)反应得到[Ru(CO)2(tdt-κ2SS′)(terpy-κ2NN′)] 2b,但未能识别[Ru(CO)2(tdt-κS)(terpy-κ3NN′N′′)] 2a。因此,双齿的二
硫代烯和双齿的
吡啶配合物似乎比单齿的二
硫代烯和三齿的
吡啶配合物更稳定。在[Ru(CO)2Cl(terpy)]PF6与pdt2−的Cs+盐在CH3OH和N2气氛下的反应中,既没有得到[Ru(CO)2(pdt-κS)(terpy-κ3NN′N′′)] 3a,也没有获得[Ru(CO)2(pdt-κ2S)(terpy-κ2NN′)] 3b(pdt = PhC(S)C(S)Ph)。在空气条件下进行相同的反应则得到了[Ru(CO)(C(O)OCH3)(SC(Ph)C(Ph)SC(O)OMe)(terpy-κ3NN′N′′)] 3,该化合物是由于
CO2和CH3OH分别对pdt的末端
硫和3a的羰基碳的双重加成,随后在CH3OH中进行酯化反应得到的。向3a的
硫上加 归因于pdt的强碱性和较弱的螯合能力,相较于mnt和tdt。还制备了一系列[RuX(dithiolene)(terpy)]n+(X = dmso, Cl或OSO2CF3; n = 0或1)。