TY - JOUR
T1 - First examples of 3d-uranium compounds derived from single-compartment Schiff base ligands
T2 - Syntheses, crystal structures and d-d band correlation
AU - Mandal, Leena
AU - Bhattacharya, Sagarika
AU - Mohanta, Sasankasekhar
N1 - Funding Information:
Financial support from the Government of India through Department of Science and Technology (Project number SR/S1/IC-42/2011), University Grants Commission (Fellowship to L. Mandal) and Council for Scientific and Industrial Research (Fellowship to S. Bhattacharya) is gratefully acknowledged. Crystal data of 1 – 3 were 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 paper deals with the syntheses, characterization, crystal structures and UV-Vis spectroscopy of three diphenoxo-bridged dinuclear Cu II(UVIO2) compounds [CuII(MeCN) L1(UVIO2)(NO3)2] (1), [CuII(MeCN)L2 (UVIO2)(NO 3)2] (2) and [CuII(MeCN)L3(U VIO2)(NO3)2] (3) derived from the single-compartment Schiff base ligands H2L1 (2:1 condensation product of salicylaldehyde and 1, 3-diaminopropane), H2L2 (2:1 condensation product of salicylaldehyde and 1-ethyl-1, 3-diaminopropane) and H2L3 (2:1 condensation product of 2-hydroxyacetophenone and 1, 3-diaminopropane). While copper(II) occupies the N2O 2 compartment, uranium(VI) center is linked with Schiff base ligand through the two bridging phenoxo oxygen atoms. Copper(II) is pentacoordinated and distorted square pyramidal, while the uranium(VI) center is octaco-ordinated and distorted hexagonal bipyramidal in which the two uranyl oxygen atoms occupy the apical positions. Electronic spectra of 1-3 and the corresponding mononuclear CuII compounds have been recorded and a previously reported but practically unexplored correlation regarding d-d band position has been highlighted. Although the correlation is not valid for only mononuclear or only dinuclear compounds derived from different ligands, a nice correlation is found out on comparing the spectra of dinuclear compounds with the corresponding mononuclear compounds.
AB - This paper deals with the syntheses, characterization, crystal structures and UV-Vis spectroscopy of three diphenoxo-bridged dinuclear Cu II(UVIO2) compounds [CuII(MeCN) L1(UVIO2)(NO3)2] (1), [CuII(MeCN)L2 (UVIO2)(NO 3)2] (2) and [CuII(MeCN)L3(U VIO2)(NO3)2] (3) derived from the single-compartment Schiff base ligands H2L1 (2:1 condensation product of salicylaldehyde and 1, 3-diaminopropane), H2L2 (2:1 condensation product of salicylaldehyde and 1-ethyl-1, 3-diaminopropane) and H2L3 (2:1 condensation product of 2-hydroxyacetophenone and 1, 3-diaminopropane). While copper(II) occupies the N2O 2 compartment, uranium(VI) center is linked with Schiff base ligand through the two bridging phenoxo oxygen atoms. Copper(II) is pentacoordinated and distorted square pyramidal, while the uranium(VI) center is octaco-ordinated and distorted hexagonal bipyramidal in which the two uranyl oxygen atoms occupy the apical positions. Electronic spectra of 1-3 and the corresponding mononuclear CuII compounds have been recorded and a previously reported but practically unexplored correlation regarding d-d band position has been highlighted. Although the correlation is not valid for only mononuclear or only dinuclear compounds derived from different ligands, a nice correlation is found out on comparing the spectra of dinuclear compounds with the corresponding mononuclear compounds.
KW - 3D-5f compounds
KW - Crystal structure
KW - Schiff base
KW - Spectral correlation
KW - Uranyl
UR - http://www.scopus.com/inward/record.url?scp=84881153408&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2013.07.012
DO - 10.1016/j.ica.2013.07.012
M3 - Article
AN - SCOPUS:84881153408
SN - 0020-1693
VL - 406
SP - 87
EP - 94
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
ER -