CHELATE COMPOUNDS OF DIOXOMOLYBDENUM(VI) WITH SALICYLIDENEHYDROXYALKYLAMINES - CRYSTAL-STRUCTURE OF THE SOLVATE (1-1) OF DIOXO(3,5-DICHLOROSALI-CYLIDENEMONOETHANOLIMINATO)MOLYBDENUM(VI) WITH METHANOL MOO2(C9H7NO2CL2).CH3OH
Sergienko, VS; Abramenko, VL; Poraikoshits, MA; Garnovskii, AD
The complexes MoO2L.CH3OH (I), where H2L represents substituted beta-hydroxynaphthylidene- and R-salicylidenemonoethanolamines (R = H, 5-Br, 5-NO2, 3,5-Cl2), were synthesized and submitted to IR-spectroscopic investigation. The structure of (I), MoO2(C9H7NO2Cl2).CH3OH, was determined by x-ray crystallographic analysis (lambda Mo, R = 0.031 in 2921 reflections). The lemon-yellow crystals are triclinic with a = 6.7406, b = 7.0097, c = 16.024 angstrom, alpha = 94.737, beta = 91.298, gamma = 115.253-degrees, d(det) = 1.99 g/cm3, Z = 2, space group P1BAR. The Mo atom has a distorted octahedral coordination with cis-located multiply bonded oxo ligands. The N atom of the tridentate dianionic ligand L2- and the O(5) atom of the methanol solvate molecule are in the trans positions to the oxo atoms O(1,2), and the deprotonated O(3) atom of the hydroxyazomethine fragment and the O(4) atom of the ethanolamine branch are in the cis positions. The Mo-O(5) bond and Mo-N bond, trans in relation to Mo = O(oxo), are elongated as a result of the trans effect of the multiply bonded oxo ligands. The principal bond lengths and bond angles are as follows: Mo-O(1) = 1.691, Mo-O(2) = 1.701, Mo-O(3) = 1.966, Mo-O(4) = 1.947, Mo-O(5) = 2.336, Mo-N = 2.277 angstrom, O(1)MoO(2) = 106.7-degrees.