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Lal RA Basumatary D Adhikari S Kumar A 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,69(3):706-714
The monomer molybdenum(VI) complex [MoO(2)(napoxlhH(2))].2H(2)O (1) has been synthesized from the reaction of MoO(2)(acac)(2) with bis(2-hydroxy-1-naphthaldehyde)oxaloyldihydrazone (napoxlhH(4)) in 1:1 molar ratio in ethanol under reflux. This complex on reaction with pyridine/3-picoline/4-picoline yielded the dimer molybdenum(VI) complexes [Mo(2)O(4)(napoxlhH(2))(2)(A)(2)].2H(2)O (A=py (2), 3-pic (3), 4-pic (4)), whereas reaction with isonicotinoylhydrazine (inhH(3)) and salicyloylhydrazine (sylshH(3)) lead to the reduction of the metal centre yielding monomeric molybdenum(V) complexes [Mo(napoxlhH(2))(hzid)].2H(2)O (where hzidH(3)=inhH(3) (5) and sylshH(3) (6)). The complexes have been characterized by elemental analyses, molecular weight determinations, molar conductance data, magnetic moment data, electronic, IR, ESR and (1)H NMR spectroscopic studies. The complexes (5) and (6) are paramagnetic to the extent of one unpaired electron. The electronic spectra of the complexes are dominated by strong charge transfer bands. In all of the complexes, the principal dihydrazone ligand has been suggested to coordinate to the metal centres in the anti-cis-configuration. The complexes (1), (5) and (6) are suggested to have six-coordinate octahedral stereochemistry around molybdenum(VI) and molybdenum(V) metal centres, respectively, while the complexes (2)-(4) are suggested to have eight coordinate dodecahedral stereochemistry around molybdenum(VI) metal centre. 相似文献
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Dutta Debajani Roy Sushanta Kumar Das Bodhaditya Talukdar Anup K. 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2018,92(5):976-983
Russian Journal of Physical Chemistry A - The present work deals with the adsorption of Cu2+ and Pb2+ on zeolites (ZSM-5, mordenite) and mesoporous materials (MCM-48, MCM-41). The characterization... 相似文献
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Tripathy Debajani Chakroborty Subhendu Gadtya Ankita Subhrasmita Mahaling Ram Naresh Moharana Srikanta Barik Arundhati Pal Kaushik 《The European physical journal. E, Soft matter》2023,46(3):1-13
The European Physical Journal E - We discuss the lateral dynamics of two active force dipoles, which interact with each other via hydrodynamic interactions in a thin fluid layer that is active and... 相似文献
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Ram A. Lal Debajani Basumatary Arjun K. De Arvind Kumar 《Transition Metal Chemistry》2007,32(4):481-493
The present study shows that the reaction of different salts of the same metal with sterically crowded dihydrazone bis(2-hydroxy-1-naphthaldehyde)malonoyldihydrazone (CH2LH4) in ethanol/aqueous media gives complexes of different stereochemistry. While the reaction of zinc(II) and copper(II) sulphate
with dihydrazone yields tetrahedral complexes, the zinc(II) and copper(II) chlorides give square pyramidal and distorted octahedral
complexes, respectively. On the other hand, nickel(II) sulphate and chloride, both give high-spin octahedral complexes with
dihydrazone, manganese sulphate gives low-spin octahedral and manganese(II) chloride gives high-spin octahedral complexes.
The reaction of these complexes with KF has been investigated. All of the products have been characterized by analytical,
magnetic moment and molar conductivity data. The structures of the complexes have been established by spectroscopic studies. 相似文献
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