Abstract
Symmetrical mercury derivative of exo- nido-ruthenacarborane was prepared by two routes: mercuration of exo- nido-5,6,10-[Cl(Ph 3P) 2Ru]-5,6,10-(μ-H) 3-10-H-7,8-C 2B 9H 8 ( 1) and interaction of Ru(PPh 3) 3Cl 2 with [10,10′-Hg-(7,8-C 2B 9H 11) 2]Cs 2. Using o-carboran-9-ylmercury trifluoroacetate for mercuration of 1 leads to an unsymmetrical mercury compound with 9- o-carboranyl and exo- nido-ruthenacarboranyl ligands: 5′,6′,10′- exo- nido-[Cl(Ph 3P) 2Ru]-5′,6′,10′-(μ-H) 3-10′-(1,2-C 2B 10H 11Hg-9)-7′,8′-C 2B 9H 8 ( 4). The same compound was prepared by the action of Ru(PPh 3) 3Cl 2 on [9,10′-Hg-(1,2-C 2B 10H 11)(7′,8′-C 2B 9H 11)]Cs ( 5). Both types of new compounds were obtained as a mixture of cis/ trans isomers which were separated and characterized by elemental analysis and NMR spectra. The X-ray structure of trans-5′,6′,10′- exo- nido-[Cl(Ph 3P) 2Ru]-5′,6′,10′-(μ-H) 3-10′-(1,2-C 2B 10H 11Hg-9)-7′,8′-C 2B 9H 8 ( 4b) was determined.
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