Structural studies in the phenylmercury/oxinate system

Abstract

The crystal structures of PhHgL [L = quinaldinate, C₁₀H₈NO^- (1); oxinate, C₉H⁶NO^-, two phases, (2) and (3)] have been determined at 295 K and refined by least squares to residuals of 0.068 (2148 'observed' reflections) for (1), 0.107 (1165) for (2) and 0.046 (1146) for (3). Crystals of (1) are mono-clinic, C2/c, a 22.961(8), b 9.142(2), c 16.412(6) Ǻ, β 127.75(2)°, Z 8; those of (2) are orthorhombic, Pnam, a 23.12(3), b 16.59(2), c 6.62(1) Ǻ, Z 8; those of (3) are orthorhombic, P2₁2₁2₁, a 5.584(2), b 9.902(3), c 22.073(9) Ǻ, Z 4.     In (1) the molecules are grouped as loose dimeric associations about a twofold axis with Hg...O bridges. In (2) the molecules lie stacked in a loose infinite array along c, while in (3) the disposition is an infinite helical array; in both (2) and (3), the Hg...O contacts are very long.