Structure of complex compounds of zinc with malonamide. Crystal structures of Zn(NCS)/sub 2/(MAA)/sub 2/ and Zn(NO/sub 3/)/sub 2/(MAA)/sub 2/
Journal Article
·
· Sov. J. Coordinat. Chem.; (United States)
OSTI ID:6413523
An x-ray diffraction investigation of two compounds of zinc with malonamide Zn(NCS)/sub 2/(MAA)/sub 2/ (I) and Zn(NO/sub 3/)/sub 2/(MAA)/sub 2/ (II), where MAA = (CONH/sub 2/)/sub 2/CH/sub 2/, has been carried out (autodiffractometer, lambdaMo, graphite monochromator, 1054 reflections for I and 2665 reflections for II, anisotropic least-squares method to R = 0.031 (I) and R = 0.033 (II)). The crystals of compound I are monoclinic: ..cap alpha.. = 8.512, b = 8.301, c = 11.294 A, ..gamma.. = 109.28/sup 0/, space group P2/sub 1//a. The crystals of compound II are trinclinic: a = 7.098, b = 7.258, c = 7.650 A, ..cap alpha.. = 90.65, ..beta.. = 116.28/sup 0/, ..gamma.. = 106.50/sup 0/, space group P anti 1. The crystal structures of compounds I and II are, in principle, of the same type: they are built up from monomeric ZnX/sub 2/(MAA)/sub 2/ molecules with octahedral coordination of the zinc atom, the ..pi..-acid ligands NCS and NO/sub 3/ in trans positions, and bidentate MAA ligands coordinated by means of the oxygen atoms of both carbonyl groups with the formation of six-membered chelate rings. The Zn-O(MAA) distance is equal to 2.091(4) +/- 0.01 A on the average. The lengths of the bonds with the same designations in the MAA ligands in complexes I and II vary in the following ranges: C-O, 1.250-1.256; C-C, 1.513-1.514; C-N, 1.309-1.311 A. However, the conformations of the chelate rings in complexes I and II are not identical, attesting to the configurational instability of the MAA ligand. The ZnX/sub 2/(MAA)/sub 2/ complex molecules in both structures are connected to one another by a system of H bonds.
- Research Organization:
- Georgian Polytechnic Institute, USSR
- OSTI ID:
- 6413523
- Journal Information:
- Sov. J. Coordinat. Chem.; (United States), Journal Name: Sov. J. Coordinat. Chem.; (United States) Vol. 11:10; ISSN SJCCD
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5889244
Related Subjects
36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMIDES
ANTITHYROID DRUGS
BINDING ENERGY
BOND ANGLE
BOND LENGTHS
CARBONIC ACID DERIVATIVES
CATALYTIC EFFECTS
CHELATES
CHEMICAL BONDS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DIMENSIONS
DISTANCE
DRUGS
ELEMENTS
ENERGY
HORMONE ANTAGONISTS
HYDROGEN
INTERATOMIC DISTANCES
LATTICE PARAMETERS
LEAST SQUARE FIT
LENGTH
MAXIMUM-LIKELIHOOD FIT
MOLECULAR STRUCTURE
MONOCLINIC LATTICES
NITRATES
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
SCATTERING
SPACE GROUPS
STRUCTURAL CHEMICAL ANALYSIS
THIOCYANATES
TRICLINIC LATTICES
X-RAY DIFFRACTION
ZINC COMPLEXES
ZINC COMPOUNDS
ZINC NITRATES
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMIDES
ANTITHYROID DRUGS
BINDING ENERGY
BOND ANGLE
BOND LENGTHS
CARBONIC ACID DERIVATIVES
CATALYTIC EFFECTS
CHELATES
CHEMICAL BONDS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DIMENSIONS
DISTANCE
DRUGS
ELEMENTS
ENERGY
HORMONE ANTAGONISTS
HYDROGEN
INTERATOMIC DISTANCES
LATTICE PARAMETERS
LEAST SQUARE FIT
LENGTH
MAXIMUM-LIKELIHOOD FIT
MOLECULAR STRUCTURE
MONOCLINIC LATTICES
NITRATES
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
SCATTERING
SPACE GROUPS
STRUCTURAL CHEMICAL ANALYSIS
THIOCYANATES
TRICLINIC LATTICES
X-RAY DIFFRACTION
ZINC COMPLEXES
ZINC COMPOUNDS
ZINC NITRATES