Journal of Chemistry

Research Article

Synthesis of Oxovanadium(IV) Complexes with Tetraaza Coordinating Ligands

Table 1

Physical and analytical data of the complexes.
ComplexEmpirical formulaDecomp. temp. (°C)C% calcd. (found)H% calcd. (found)N% calcd. (found)V% calcd. (found)S% calcd. (found) BM (300°C )
VO(L1) SO4C22H18N4VS3O521646.7 (46.6)3.2 (3.2)9.9 (9.8)9.0 (9.0)17.0 (16.9)1.71
VO(L2) SO4C20H16N6VS3O521442.3 (42.1)2.8 (2.7)14.8 (14.7)9.0 (9.0)16.9 (16.8)1.75
VO(mac1) SO4C27H22N4VS3O521851.5 (51.4)3.5 (3.4)8.9 (8.8)8.1 (8.0)15.3 (15.3)1.72
VO(mac2) SO4C32H24N4VS3O522155.6 (55.6)3.5 (3.4)8.1 (8.1)7.4 (7.3)13.9 (13.8)1.74
VO(mac3) SO4C30H19N4VS4O5F322047.9 (47.8)2.5 (2.4)7.5 (7.5)6.8 (6.7)17.0 (16.9)1.76
VO(mac4) SO4C37H26N4VS3O521759.0 (58.9)3.5 (3.4)7.4 (7.3)6.8 (6.8)12.8 (12.7)1.75
VO(mac5) SO4C25H20N6VS3O521547.5 (47.4)3.2 (3.1)13.3 (13.2)8.1 (8.0)15.2 (15.1)1.73
VO(mac6) SO4C30H22N6VS3O522052.0 (51.9)3.2 (3.1)12.1 (12.1)7.4 (7.3)13.9 (13.8)1.74
VO(mac7) SO4C28H17N6VS4O5F321644.6 (44.5)2.3 (2.2)11.2 (11.1)6.8 (6.8)17.0 (17.0)1.75
VO(mac8) SO4C35H24N6VS3O521855.6 (55.4)3.2 (3.2)11.1 (11.2)6.7 (6.6)12.7 (12.6)1.72
L1: ligand derived by condensation of thenil with 1,4-diaminobenzene (1 : 2); L2: ligand derived by condensation of thenil with 3,4-diaminopyridine (1 : 2); Mac1: macrocyclic ligand derived by condensation of L1 with acetylacetone; Mac2: macrocyclic ligand derived by condensation of L1 with benzoylacetone; Mac3: macrocyclic ligand derived by condensation of L1 with thenoyltrifluoroacetone; Mac4: macrocyclic ligand derived by condensation of L1 with dibenzoylmethane; Mac5: macrocyclic ligand derived by condensation of L2 with acetylacetone; Mac6: macrocyclic ligand derived by condensation of L2 with benzoylacetone; Mac7: macrocyclic ligand derived by condensation of L2 with thenoyltrifluoroacetone; Mac8: macrocyclic ligand derived by condensation of L2 with dibenzoylmethane. The elemental analyses (Table 1) of complexes show 1 : 1 metal to ligand stoichiometry.