Reaction of 2, 2'-dilithio (or dibromomagnesio)-1, 1'-binaphthyl with 2 eqiv. of (N, N-diethylamino) phenylchloroborane, or quimolar amounts of diethylaminodichloroborane, followed by hydrolysis and chelati on with N, O-bidentate ligands, afforded the unexpected (2- binaphthyl) phenylboron chelates Ⅱ or bis (2-binaphthyl) boron chelates Ⅳ respectively, instead of the expected 1, 1'-binaphtyl- 2, 2'-bis (phenylboryl) chelates Ⅰ or dinaphthoborole derivatives Ⅲ. These evidences show that the only one M-C bond in 2, 2'-dimetallized 1, 1'-binaphthyl participates in the nucleophilic reaction with aminochloroboranes and another M-C bond loses its transarylation activity. The reaction mechanism in connection with a possible 7- membered ring transition state was describedion.

Key words: INFRARED SPECTROPHOTOMETRY, BINAPHTHYL P, MASS SPECTROGRAPHY, BORANES, BORON COMPOUNDS, REACTION MECHANISM