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

ABSTRACT: The title compound, [Ni(C6H4NO2)2(C16H38N6)], was prepared through self-assembly of a nickel(II) aza-macrocyclic complex with isonicotinic acid. The Ni(II) atom is located on an inversion center and exhibits a distorted octa-hedral N4O2 coordination environment, with the four secondary N atoms of the aza-macrocyclic ligand in the equatorial plane [average Ni-Neq = 2.064 (11) Å] and two O atoms of monodentate isonicotinate anions in axial positions [Ni-Oax = 2.137 (1) Å]. Intra-molecular N-H⋯O hydrogen bonds between one of the secondary amine N atoms of the aza-macrocyclic ligand and the non-coordinating carboxyl-ate O atom of the anion stabilize the mol-ecular structure. Inter-molecular N-H⋯N hydrogen bonds, as well as π-π inter-actions between neighbouring pyridine rings, give rise to the formations of supra-molecular ribbons extending parallel to [001].

SUBMITTER: Shin JW

PROVIDER: S-EPMC4770951 | biostudies-literature |

REPOSITORIES: biostudies-literature

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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.

Project description: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].

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Crystal structure of trans-(1,8-dibutyl-1,3,6,8,10,13-hexa-aza-cyclo-tetra-decane-κ(4) N (3),N (6),N (10),N (13))bis-(thio-cyanato-κN)nickel(II) from synchrotron data.

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(2-Amino-benzoato-κO,O')(rac-5,5,7,12,12,14-hexa-methyl-1,4,8,11-tetra-aza-cyclo-tetra-decane-κN,N',N'',N''')nickel(II) perchlorate monohydrate.

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