TY - JOUR
T1 - Diaquadinitratouranyl(VI) enforces the O(phenoxo)2O(methoxy) 2 compartment of 3-methoxysalicylaldehyde-diamine ligands to interact with water molecules
AU - Bhattacharya, Sagarika
AU - Jana, Arpita
AU - Fleck, Michel
AU - Mohanta, Sasankasekhar
N1 - Funding Information:
Financial support from the Government of India through Department of Science and Technology (Project No. SR/S1/IC-42/2011) and Council for Scientific and Industrial Research (Fellowship to S. Bhattacharya and A. Jana) are gratefully acknowledged. Crystal data of 1 was collected at the DST (Government of India)–FIST funded Single Crystal X-ray Diffractometer Facility at the Department of Chemistry, University of Calcutta.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - This report presents the syntheses, characterization and crystal structures of [{CuIIL1}2·{(UVIO 2)(NO3)2(H2O)2}] (1), [{CuIIL2}2·{(UVIO 2)(NO3)2(H2O)2}]· 2H2O (2) and [{CuIIL3} 2{(UVIO2)(NO3)2(H 2O)2}]·2H2O (3) derived from three 3-methoxysalicylaldehyde-diamine Schiff base compartmental ligands H 2L1, H2L2 and H2L 3, in which the diimine moieties come from ethylenediamine, trans-1,2-diaminocyclohexane and ortho-phenylenediamine, respectively. Compounds 2 and 3 crystallize in triclinic crystal system having P1 space group, while compound 1 crystallizes in monoclinic symmetry with space group P2 1/c. The three structures are similar. The two coordinated water molecules in diaquadinitratouranyl(VI) occupy the two trans positions in the hexagonal basal plane of the hexagonal bipyramidal coordination environment. Each of these two water molecules interact, by forming bifurcated hydrogen bonds, with each of the two O(phenoxo)2O(methoxy)2 compartments resulting in the stabilization of the [1×2 + 1×1] trimetallic self-assemblies. The d-d spectra of 1-3 and the corresponding mononuclear copper(II) complexes [CuIIL1(H 2O)]/[CuIIL2(H2O)]/[Cu IIL3(H2O)] have been recorded. The previously proposed but little addressed correlation of d-d band position with the displacement of the copper(II) center from the least-squares basal plane has been highlighted, revealing the utilization of this correlation accompanied with the FT-IR data to judge the nature of water molecule in the mononuclear complexes. The unique features in the composition of 1-3 have been discussed.
AB - This report presents the syntheses, characterization and crystal structures of [{CuIIL1}2·{(UVIO 2)(NO3)2(H2O)2}] (1), [{CuIIL2}2·{(UVIO 2)(NO3)2(H2O)2}]· 2H2O (2) and [{CuIIL3} 2{(UVIO2)(NO3)2(H 2O)2}]·2H2O (3) derived from three 3-methoxysalicylaldehyde-diamine Schiff base compartmental ligands H 2L1, H2L2 and H2L 3, in which the diimine moieties come from ethylenediamine, trans-1,2-diaminocyclohexane and ortho-phenylenediamine, respectively. Compounds 2 and 3 crystallize in triclinic crystal system having P1 space group, while compound 1 crystallizes in monoclinic symmetry with space group P2 1/c. The three structures are similar. The two coordinated water molecules in diaquadinitratouranyl(VI) occupy the two trans positions in the hexagonal basal plane of the hexagonal bipyramidal coordination environment. Each of these two water molecules interact, by forming bifurcated hydrogen bonds, with each of the two O(phenoxo)2O(methoxy)2 compartments resulting in the stabilization of the [1×2 + 1×1] trimetallic self-assemblies. The d-d spectra of 1-3 and the corresponding mononuclear copper(II) complexes [CuIIL1(H 2O)]/[CuIIL2(H2O)]/[Cu IIL3(H2O)] have been recorded. The previously proposed but little addressed correlation of d-d band position with the displacement of the copper(II) center from the least-squares basal plane has been highlighted, revealing the utilization of this correlation accompanied with the FT-IR data to judge the nature of water molecule in the mononuclear complexes. The unique features in the composition of 1-3 have been discussed.
KW - Blue shifting
KW - Compartmental ligands
KW - Crystal structure
KW - Self-assemblies
KW - Spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84879808117&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2013.05.017
DO - 10.1016/j.ica.2013.05.017
M3 - Article
AN - SCOPUS:84879808117
SN - 0020-1693
VL - 405
SP - 196
EP - 202
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
ER -