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Two new dioxomolybdenum(VI) complexes [MoO2(Bhbz) (CH3OH)] (1) and [MoO2(Cnbz)(CH3OH)] (2) with the benzohydrazone ligands H2Bhbz and H2Cnbz derived from 5-chlorosalicylaldehyde with 4-nitrobenzohydrazide and 3-bromosalicylaldehyde with 2-hydroxybenzohydrazide, respectively, have been synthesized and structurally characterized by physicochemical methods and single crystal X-ray determination. The crystal of (1) crystallizes in triclinic space groupP-1, witha= 8.0014(9),b= 9.6294(10),c= 11.4204(12) Å,α= 89.193(2),β= 87.833(2),γ= 89.110(2)°,V= 879.11(16) Å3,Z= 2,R1= 0.0464,wR2= 0.1185,S= 1.051. The crystal of (2) crystallizes in monoclinic space groupP21/c, witha= 7.4108(3),b= 18.7901(7),c= 12.6293(5) Å,β= 104.4850(10)°,V= 1702.72(12) Å3,Z= 4,R1= 0.0236,wR2= 0.0576,S= 1.061. X-ray analysis indicates that the structures of both complexes are similar to each other. The molybdenum atom in each complex is in an octahedral coordination environment, constructed by two oxo groups and NO2donor set of the ligand, and one methanol O atom. The complexes have effective catalytic property for the oxidation of several olefins. [ABSTRACT FROM PUBLISHER]

Two new dioxomolybdenum(VI) complexes, [MoO2 (Cinh)(CH3OH)] (1) and [MoO2(Minh)(CH3OH)] (2), with the isonicotinohydrazone ligands H2Cinh and H2Minh derived from isonicotinohydrazide with 5-chlorosalicylaldehyde and 3-methoxysalicylaldehyde, respectively, have been synthesized and structurally characterized by physico-chemical methods and single crystal X-ray determination. The crystal of (1) crystallizes in triclinic space group P-1, with a = 6.553(2), b = 10.737(4), c = 12.907(4) Å, α = 68.021(2), β = 83.788(3), γ = 75.072(3)°, V = 813.6(5) Å3, Z = 2, R1 = 0.0291, wR2 = 0.0617, S = 1.044. The crystal of (2) crystallizes in monoclinic space group P21/n, with a = 6.792(2), b = 30.259(4), c = 7.920(3) Å, β = 93.703(3)°, V = 1624.3(8) Å3, Z = 4, R1 = 0.0501, wR2 = 0.1250, S = 1.087. X-ray analysis indicates that the structures of both complexes are similar to each other. The molybdenum atom in each complex is in an octahedral coordination environment, constructed by two oxo groups and NO2 donor set of the isonicotinohydrazone ligand, and one methanol O atom. [ABSTRACT FROM AUTHOR]