Phosphine compounds [2,6-((BuOCH2)-Bu-t)(2)C6H3]PPh2 (1) and [2,6-(Me2NCH2)(2)C6H3]PPh2 (2) containing Y,C,Y-chelating ligands were treated with BH3 center dot SMe2. Coordination of BH3 center dot SMe2 by 2 produced complex [2,6-(Me2NCH2)(2)C6H3]Ph2P}center dot(BH3)(3) (3). Compound 3 was characterized by means of elemental analyses, H-1, B-11, C-13, P-31 NMR spectroscopy, and by single crystal X-ray diffraction analysis.