THE CRYSTAL AND MOLECULAR-STRUCTURE OF NAPHTHYL)-1-ETHYNYL]-1-NAPHTHYL)-TRIMETHYLSTANNANE - [ME3SN(C10H6C=CC10H6OME)]

The crystal and molecular structure of hoxy-2-naphthyl)-1-ethynyl]-1-n aphthyl}-trimethyl- stannane, [Me3Sn(C10H6C=CC10H6OMe)], C26H24OSn, ha s been determined at room temperature. The colorless crystals are tric linic, space group P (1) over bar with unit cell dimensions a = 9.489( 1) Angstrom, b = 16.931(4) Angstrom, c = 7.174(2) Angstrom, alpha = 97 .61(2)degrees, beta = 106.58(1)degrees, gamma = 94.76(2)degrees, Z = 2 and D-x = 1.441 Mg m(-3). The structure was refined by a full-matrix least-squares procedure on F to final R = 0.049 using 3736 reflections with I greater than or equal to 3.0 sigma(I). The tin center exists i n a distorted tetrahedral geometry defined by four carbon atoms with S n-C in the range 2.137(6) Angstrom to 2.168(5) Angstrom. Steric hindra nce in the molecule, indicated by a close Sn ... C=C contact of 3.192( 5) Angstrom, is responsible for the major distortions from the ideal g eometry.