Crystal structure of trans-(1,8-dibutyl-1,3,6,8,10,13-hexa-aza-cyclo-tetra-decane-?(4) N (3),N (6),N (10),N (13))bis-(isonicotinato-?O)copper(II) from synchrotron data.

ABSTRACT: The title compound, [Cu(C6H4NO2)2(C16H38N6)] has been synthesized and characterized by structure analysis based on synchrotron data and by FT-IR spectroscopy. The asymmetric unit consists of half of the Cu(II) complex, the other half being completed by inversion symmetry. The Cu(II) ion has a tetra-gonally distorted octa-hedral coordination sphere with four secondary N atoms of the aza-macrocyclic ligand in the equatorial plane [Cu-Neq = 2.018?(12)?Å] and two O atoms of the isonicotinate anions at the axial positions [Cu-Oax = 2.4100?(11)?Å]. Intra-molecular N-H?O hydrogen bonds between one of the secondary amine N-H groups of the aza-macrocyclic ligand and the non-coordinating O atom of the isonicotinate ions stabilize the mol-ecular structure. Inter-molecular N-H?N hydrogen bonds between the other macrocyclic N-H group and the pyridine N atom of an adjacent isonicotinate anion as well as ?-? inter-actions [centroid-to-centroid distance 3.711?(2)?Å] lead to the formation of rods parallel to [001].

SUBMITTER: Shin JW 

PROVIDER: S-EPMC4384583 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature