Bis[3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinato]nickel(II) tetrahydrate
In the title complex, [Ni(C11H9ClN3O2)2]·4H2O, the Ni atom is coordinated by four N atoms and two O atoms derived from two tridentate 3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinate ligands. The cis-N4O2 donor set defines a distorted octahedral geometry. In the crystal structure, the complex and water molecules are linked by O—H⋯O hydrogen bonds.
Aquatris[6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinato]-κ6 N,N′,O;κO-dysprosium(III) trihydrate
In the title complex, [Dy(C11H10N3O2)3(H2O)]·3H2O, the DyIII atom is coordinated by four N atoms and four O atoms derived from three tridentate deprotonated 6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinate ligands and one water molecule. The complex and solvent water molecules are linked together via O—H⋯O, O—H⋯N, C—H⋯O and C—H⋯π hydrogen-bonding interactions, forming a three-dimensional network structure.
Vibrational spectra and normal coordinate analysis of bis(glycino) complexes with Ni(II), Cu(II) and Co(II)
Abstract The i.r. and Raman spectra of bis(glycino) complexes of Ni(II), Cu(II) and Co(II) are reported. In order to aid band assignments, isotope substitutions such as H/D, 14 N/ 15 N, 58 Ni/ 62 Ni and 63 Cu/ 65 Cu have been carried out. Normal coordinate analyses on trans-bis(glycino) complexes of Ni(II) and Cu(II) have been made based on these data. The results provide definitive band assignments of the metal—nitrogen and metal—oxygen stretching modes which have been controversial.