TY - JOUR
T1 - Syntheses, structures and magnetic properties of two one-dimensional coordination polymers of cobalt(II) and nickel(II) dicyanamide containing a tridentate N-donor Schiff base
AU - Kundu, Subhasish
AU - Roy, Subhasis
AU - Bhar, Kishalay
AU - Ghosh, Rajarshi
AU - Lin, Chia Her
AU - Ribas, Joan
AU - Ghosh, Barindra Kumar
N1 - Funding Information:
Financial support from the CSIR and DST New Delhi, India is gratefully acknowledged. KB and SR are grateful to the CSIR and UGC, New Delhi, India for fellowships. JR thanks the financial support from the Spanish Government (Grant CTQ2009/07264/BQU). C-HL acknowledges the support by National Science Council, Taiwan (NSC101-2113-M-033-007-MY3). Appendix A
PY - 2013/4/24
Y1 - 2013/4/24
N2 - Two neutral one-dimensional coordination polymers of the type [M(L)(μ1,5-dca)(dca)]n [M = Co (1), Ni (2); L = (N,N-diethyl,N′-(pyridin-2-yl)benzylidene)ethane-1,2-diamine; dca = dicyanamide] are isolated through single-pot reactions of a 1:1:2 M ratio of M(OAc)2·4H2O, L and Na(dca) in MeOH solution at room temperature and characterized on the basis of microanalyses, spectroscopic, thermal and other physicochemical results. X-ray structural study reveals that each metal(II) center in both compounds adopts a distorted octahedral geometry with an MN6 chromophore coordinated by three N atoms of the tridentate Schiff base (L) and three nitrile N atoms of one terminal and two single μ1,5 bridged dca units in a meridional alignment; each μ1,5 bridged dca unit connects other neighboring metal centers in a non-ending fashion affording a 1D chain. Variable-temperature magnetic susceptibility measurements of 1 and 2 show weak antiferromagnetic interactions among the metal centers through μ1,5 dca bridges.
AB - Two neutral one-dimensional coordination polymers of the type [M(L)(μ1,5-dca)(dca)]n [M = Co (1), Ni (2); L = (N,N-diethyl,N′-(pyridin-2-yl)benzylidene)ethane-1,2-diamine; dca = dicyanamide] are isolated through single-pot reactions of a 1:1:2 M ratio of M(OAc)2·4H2O, L and Na(dca) in MeOH solution at room temperature and characterized on the basis of microanalyses, spectroscopic, thermal and other physicochemical results. X-ray structural study reveals that each metal(II) center in both compounds adopts a distorted octahedral geometry with an MN6 chromophore coordinated by three N atoms of the tridentate Schiff base (L) and three nitrile N atoms of one terminal and two single μ1,5 bridged dca units in a meridional alignment; each μ1,5 bridged dca unit connects other neighboring metal centers in a non-ending fashion affording a 1D chain. Variable-temperature magnetic susceptibility measurements of 1 and 2 show weak antiferromagnetic interactions among the metal centers through μ1,5 dca bridges.
KW - Antiferromagnetism
KW - Cobalt(II)/nickel(II) coordination polymer
KW - Dicyanamide
KW - N-donor Schiff base
KW - X-ray structure
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U2 - 10.1016/j.molstruc.2013.01.036
DO - 10.1016/j.molstruc.2013.01.036
M3 - Article
AN - SCOPUS:84873728520
SN - 0022-2860
VL - 1038
SP - 78
EP - 85
JO - Journal of Molecular Structure
JF - Journal of Molecular Structure
ER -