Summary
The three new potential chelating ligands dihydridobis-, hydridotris- and tetrakis-(thiophenolyl)borate anions, and their chelates with first row transition metals have been synthesised. The divalent and trivalent metal ions form complexes in 1∶2 and 1∶3 (metal:ligand) ratios respectively. The number of ligands coordinated correspond to the number of anions replaced in the metal salis. The compounds were characterized by elemental analysis, i.r. spectra, magnetic susceptibility measurements and electronic spectral studies. The CrIII and FeIII complexes of dihydridobis- and hydridotris-(thiophenolyl)borates appear to be octahedral, and those of CuII are proposed to be square planar. Tetrahedral geometry is suggested for the MnII, CoII and NiII complexes. The tetrakis-(thiophenolyl)borate yielded octahedral complexes with all the metal ions except for CuII which is square planar. The ligand field parameters 10Dq, B and β have also been calculated wherever possible. The ligands may be placed in the vicinity of EDTA in the nephelauxetic series.
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Zaidi, S.A.A., Zahoor, M.A. & Siddiqi, K.S. Transition metal complexes of potassium dihydridobis-, hydridotris- and tetrakis-(thiophenolyl)borate anions. Transition Met Chem 15, 231–235 (1990). https://doi.org/10.1007/BF01038381
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DOI: https://doi.org/10.1007/BF01038381