Synthesis, characterization and bio-activity of a bidentate NS Schiff base of S-allyldithiocarbazate and its divalent metal complexes: X-ray crystal structures of the free ligand and its nickel(II) complex

2013 ◽  
Vol 39 (2) ◽  
pp. 141-149 ◽  
Author(s):  
M. Al-Amin A. A. Islam ◽  
M. C. Sheikh ◽  
M. S. Alam ◽  
E. Zangrando ◽  
M. A. Alam ◽  
...  
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Free Ligand ◽  
Divalent Metal ◽  
X Ray ◽  
Divalent Metal Complexes

Divalent Metal Complexes of 2-Formylphenoxyacetic Acid: The Crystal Structures of 2-Formylphenoxyacetic Acid, and the Isomorphous Cobalt(II) and Zinc(II) 2-Formylphenoxyacetates

1985 ◽  
Vol 38 (9) ◽  
pp. 1381 ◽  
Author(s):  
CHL Kennard ◽  
EJ O'Reilly ◽  
G Smith ◽  
TCW Mak
Keyword(s):  
Metal Complexes ◽  
Crystal Structures ◽  
Divalent Metal ◽  
Carboxyl Groups ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Planar Molecules ◽  
Divalent Metal Complexes ◽  
Monoclinic Cell

The crystal structures of 2-formylphenoxyacetic acid ( ofpaH ), tetraaquabis (2-formylphenoxyacetato)-cobalt(II) (1) and tetraaquabis (2- formylphenoxyacetato )zinc(II) (2) have been determined by X-ray diffraction and refined to residuals R 0.039, 0.058 and 0.045 for 1197, 1178 and 1230 observed reflections respectively. 2-Formylphenoxyacetic acid crystallizes in a monoclinic cell, space group P21/n with a 8.066(2), b 7.375(1), c 14.206(2) Ǻ, β 98.12(1)° and Z 4. The planar molecules form unusual hydrogen-bonded chain polymers (O…O 2.694(3)Ǻ] linked through the carboxyl groups. The complexes (1) and (2) are isomorphous, the comparative cells being a 5.036(1), b 13.463(3), c 15.083(4) Ǻ, β 96.88(2)° for (1), and a 5.044(1), b 13.481(3), c 15.055(4) Ǻ, β 96.95(2)° for (2), with Z 2 and space group P21. The complexes have four waters and two trans-related carboxyl oxygens [mean M-O distances 2.129(5) and 2.117(3) Ǻ respectively] completing almost regular octahedral stereochemistries . The nickel(II) complex [Ni( ofpa )(H2O)4] is probably not isostructural with (1) and (2), and the copper(II) complex is also different, with formula [Cu( ofpa )2(H2O)2].

Correlation of x-ray crystallographic data and spectroscopic properties of divalent metal complexes of octaethylporphyrin

1993 ◽  
Vol 32 (7) ◽  
pp. 1233-1236 ◽  
Author(s):  
K. D. Stanley ◽  
L. Luo ◽  
R. Lopez de la Vega ◽  
J. M. E. Quirke
Keyword(s):  
Metal Complexes ◽  
Spectroscopic Properties ◽  
Divalent Metal ◽  
Crystallographic Data ◽  
X Ray ◽  
Divalent Metal Complexes

scholarly journals Discrete Metal Complexes of Two Multiply Armed Ligands

2006 ◽  
Vol 59 (5) ◽  
pp. 307 ◽  
Author(s):  
Muna R. A. Al-Mandhary ◽  
Christopher M. Fitchett ◽  
Peter J. Steel
Keyword(s):  
Metal Complexes ◽  
Crystal Structures ◽  
Free Ligand ◽  
X Ray ◽  
Coordination Modes

The syntheses and metal complexes of 1,2,4,5-tetrakis(8-quinolyloxymethyl)benzene 1 and hexakis(8-quinolyloxymethyl)benzene 2 are described. X-Ray crystal structures are reported of the free ligand 1, a binuclear silver(i) and a tetranuclear copper(i) complex of 1, as well as a binuclear cobalt(ii) and trinuclear palladium(ii) and silver(i) complexes of 2. Within these discrete metal complexes the ligands are found to adopt a range of coordination modes, with considerable variation in the relative orientations of the ligand arms as a result of the flexibility imparted by the CH2O linker units.

Divalent metal complexes of formylhydrazine: Syntheses and crystal structures of M(CH4N2O)2(H2O)2·2NO3 (M=Zn, Co)

2009 ◽  
Vol 12 (7) ◽  
pp. 619-621 ◽  
Author(s):  
Krishnan Srinivasan ◽  
Subbaiah Govindarajan ◽  
William T.A. Harrison
Keyword(s):  
Metal Complexes ◽  
Crystal Structures ◽  
Divalent Metal ◽  
Divalent Metal Complexes
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