Crystal structures of thetrans-cyclooctene complexes of copper(I) chloride and silver nitrate

The crystal and molecular structures of the title compounds CuCl·C₈H₁₄ and AgNO₃·C₈H₁₄, have been determined by single-crystal X-ray diffraction techniques, and refined by full-matrix least squares. Both compounds crystallize in the orthorhombic space groupPbca witha=6.191(7),b=12.456(2),c=23.272(4) Å for CuCl·C₈H₁₄, anda=7.383(2),b=9.825(2),c=26.980(5) Å for AgNO₃·C₈H₁₄;Z=8 in both cases. FinalR factors are 0.047 and 0.029 respectively. The cyclooctene ring has the twist chair-chair (TCC) conformation, with approximateD ₂ symmetry, in both compounds, and the torsion angles around the double bonds are –134.2(4) and –137.0(4)° respectively. Slight lengthening of the metal-complexed double bond is attributed to enhanced olefin metal -donation of thetrans bond.