POLYMERIC AND MIXED CARBOXYLATE COMPOUNDS - CRYSTAL-STRUCTURE OF [ZN(TIGLATE)0.54(BENZOATE)1.46]X

The crystal structure of [Zn(O2CC(CH3)CHCH3)0.54(O2CC6H5)1.46]x has been determined by single crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P21/c with a=10.311(1), b=13.170(1), c=19.000(2) Å, β=91.895(7)°, V=2578.7 Å3, Z=4, Dx=1.525g cm-3, λ(Mo K α)=0.71073 Å, μ=1-95 mm-1, F(000)=1206, T=295K, R=0.046 for 4548 unique reflections. The two different carboxylates are randomly scrambled along a one dimensional polymer, made up of binuclear units connected by a syn-anti carboxylate bridge. Each binuclear unit contains three syn-syn carboxylates which bridge two zinc atoms. Vibrational data indicate that [Zn(O2CC(CH3)CHCH3)2]x has the same polymeric structure; orientation of tiglate is the same as for the mixed ligand compound. Recrystallization of mixed carboxylate species produces either an alteration in carboxylate ligand ratio, or a total separation of the two carboxylates, giving two different compounds. © 1990 Plenum Publishing Corporation.