Dipole-moment measurements on metal chelate complexes. Part 4. The effect of substitution in the phenyl ring on the dipole moments of metal chelates of fluorinated mercapto-β-diketones containing a phenyl group
作者:Manoranjan Das、Stanley E. Livingstone
DOI:10.1039/dt9770000662
日期:——
have been determined from static-polarization measurements for the nickel(II), palladium(II), platinum(II), copper(II) zinc(II), cobalt(III), and rhodium(III) chelate complexes of the fluorinated mercapto-β-diketones RC(SH):CHCOCF3[R =p-MeOC6H4, m-MeOC6H4, m,p-(MeO)2C6H3, and m,p-Me2C6H3]. The moments indicate cis-square-planar conformations for the complexes of Ni, Pd, Pt, and Cu, and a facial-octahedral
偶极矩已经通过静态极化测量确定了镍(II),钯(II),铂(II),铜(II),锌(II),钴(III)和铑(III)螯合物的螯合物。氟化巯基-β-二酮RC(SH):CHCOCF 3 [R = p -MeOC 6 H 4,m -MeOC 6 H 4,m,p-(MeO)2 C 6 H 3和m,p -Me2 C 6 H 3 ]。这些时刻表明,Ni,Pd,Pt和Cu的配合物为顺方平面构象,而Co和Rh的配合物为面八面体构型。对于所有被苯环甲基取代的金属配合物,如果R基团的排列顺序为: m, p -Me 2 C 6 H 4 > p -MeC 6 H 3 > m -MeC 6 H 4,偶极矩减小。> Ph。但是,对于甲氧基取代,顺序为: p -MeOC 6ħ 4 >米,p - (MEO)2 C ^ 6 ħ 3 > pH值异常的位置米,p - (MEO)2 C ^ 6 ħ 3是归因于空间位阻阻止甲氧基的基团的自由旋转,并导致较低的组力矩µ