TY - JOUR
T1 - Zinc(II) polymeric compounds with a chelating ligand bis(2-pyridylmethyl)amine (bispicam) directed by intermolecular C/N/O-H⋯X (X = Cl, Br, I) interactions
T2 - Catalytic activities
AU - Park, Byeong Kwon
AU - Lee, Sun Hwa
AU - Lee, Eun Yong
AU - Kwak, Han
AU - Lee, Young Min
AU - Lee, Yu Jin
AU - Jun, Je Yeol
AU - Kim, Cheal
AU - Kim, Sung Jin
AU - Kim, Youngmee
PY - 2008/11/12
Y1 - 2008/11/12
N2 - [Zn(bispicam)2]2+ as a hydrogen-bond donor and three free halides (Cl-, Br- and I-) as hydrogen-bond acceptors were employed to investigate the role of non-classical C/N-H⋯X hydrogen bonding for construction of polymeric compounds. Three zinc salts (ZnCl2, ZnBr2 and ZnI2) were reacted with bis(2-pyridylmethyl)amine (bispicam) to produce [Zn(bispicam)2]Cl2 1, [Zn(bispicam)2]Br2 2 and [Zn(bispicam)2]I2 3. Hydrogen bonding interactions between Namine-H and C-H of [Zn(bispicam)2]2+ cations and free halides, and between Owater-H and free halides can play very important roles for construction of molecular packing and crystal structures. In addition, these hydrogen-bonded complexes 1, 2 and 3 were, interestingly, shown to carry out the catalytic transesterification of a range of esters with methanol at 50 °C under the mild conditions, though all these compounds are saturated with two bispicam ligands. To explain this unusual reactivity, it has been proposed that the hydrogen atom of amine N-H moiety in the complexes could do the acid-catalyzed transesterification.
AB - [Zn(bispicam)2]2+ as a hydrogen-bond donor and three free halides (Cl-, Br- and I-) as hydrogen-bond acceptors were employed to investigate the role of non-classical C/N-H⋯X hydrogen bonding for construction of polymeric compounds. Three zinc salts (ZnCl2, ZnBr2 and ZnI2) were reacted with bis(2-pyridylmethyl)amine (bispicam) to produce [Zn(bispicam)2]Cl2 1, [Zn(bispicam)2]Br2 2 and [Zn(bispicam)2]I2 3. Hydrogen bonding interactions between Namine-H and C-H of [Zn(bispicam)2]2+ cations and free halides, and between Owater-H and free halides can play very important roles for construction of molecular packing and crystal structures. In addition, these hydrogen-bonded complexes 1, 2 and 3 were, interestingly, shown to carry out the catalytic transesterification of a range of esters with methanol at 50 °C under the mild conditions, though all these compounds are saturated with two bispicam ligands. To explain this unusual reactivity, it has been proposed that the hydrogen atom of amine N-H moiety in the complexes could do the acid-catalyzed transesterification.
KW - Bis(2-pyridylmethyl)amine
KW - Catalyst
KW - Hydrogen bond
KW - Transesterification
KW - Zinc(II) coordination polymer
UR - https://www.scopus.com/pages/publications/53849091673
U2 - 10.1016/j.molstruc.2008.03.052
DO - 10.1016/j.molstruc.2008.03.052
M3 - Article
AN - SCOPUS:53849091673
SN - 0022-2860
VL - 890
SP - 123
EP - 129
JO - Journal of Molecular Structure
JF - Journal of Molecular Structure
IS - 1-3
ER -