TY - JOUR
T1 - Mononuclear transition metal complexes with sterically hindered carboxylate ligands
T2 - Synthesis, structural and spectral properties
AU - Kannan, Sethuraman
AU - Venkatachalam, Galmari
AU - Lee, Ha Jin
AU - Min, Byoung Koun
AU - Kim, Woong
AU - Koo, Eunhae
AU - Do, Young Rag
AU - Yoon, Sungho
N1 - Funding Information:
This work was supported partly by the Korea Science and Engineering Foundation (KOSEF) grant and the Converging Research Center Program through the National Research Foundation of Korea (NRF) (No. 2009-0082832 ) funded by the Korea government (MEST). This work was also supported in part by KIST (Korea Institute of Science & Technology) for ‘National Agenda Project program’, the faculty research program 2009 of Kookmin University in Korea and the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (No. R11-2005-048-00000-0 ).
PY - 2011/2/1
Y1 - 2011/2/1
N2 - The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate(L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)2(Hdmpz) 2] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N-H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.
AB - The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate(L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)2(Hdmpz) 2] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N-H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.
KW - 3,5-Dimethylpyrazole
KW - Crystal structures
KW - Mononuclear metal complexes
KW - Sterically hindered carboxylate ligand
UR - http://www.scopus.com/inward/record.url?scp=78651381794&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2010.10.019
DO - 10.1016/j.poly.2010.10.019
M3 - Article
AN - SCOPUS:78651381794
SN - 0277-5387
VL - 30
SP - 340
EP - 346
JO - Polyhedron
JF - Polyhedron
IS - 2
ER -