1-(4-Chlorophenyl)imidazole-2-thione (HtimAr) and its derivative tris(mercaptoimidazolyl)borate [BH(timAr)3]− of ruthenium complexes

Treatment of the ruthenium staring complexes with 1-(4-chloro-phenyl)imidazole-2-thione (HtimBz) in tetrahydrofuran gave a series of ruthenium complexes with HtimBz and/or [timBz]− ligands. A new ruthenaboratrane complex [Ru(CO){κ4-B,S,S,S-B(timBz)3}(PPh3)] features a ruthenium-boron dative bond and a typical Ru⋯H-B complex [Ru{κ3-H,S,S,-HB(timBz)3}(κ2-S,N-timBz)(PPh3)] shows a strong agostic Ru⋯H-B interaction.