Crystal structures of 1,1'-bis(carboxymethyl)-4,4'-bipyridinium derivatives

被引:0
作者
Kumagai, Hitoshi [1 ]
Kawata, Satoshi [2 ]
Ogihara, Nobuhiro [1 ]
机构
[1] 41-1 Yokomichi, Nagakute, Aichi 4801192, Japan
[2] Nanakuma Jonan Ku, Fukuoka 8140180, Japan
来源
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS | 2024年 / 80卷
关键词
crystal structure; hydrogen bonding; viologen; COMPLEXES;
D O I
10.1107/S2056989024005127
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The crystal structures of 2-[1'-(carboxymethyl)-4,4'-bipyridine-1,1'-diium-1-yl]-acetate tetrafluoroborate, C14H13N2O4+center dot BF4- or (Hbcbpy)(BF4), and neutral 1,1'-bis(carboxylatomethyl)-4,4'-bipyridine-1,1'-diium (bcbpy), C14H20N2O8, are reported. The asymmetric unit of the (Hbcbpy)(BF4) consists of a Hbcbpy(+) monocation, a BF4- anion, and one-half of a water molecule. The BF4 anion is disordered. Two pyridinium rings of the Hbcbpy(+) monocation are twisted at a torsion angle of 30.3 (2)degrees with respect to each other. The Hbcbpy monocation contains a carboxylic acid group and a deprotonated carboxylate group. Both groups exhibit both a long and a short C-O bond. The cations are linked by intermolecular hydrogen-bonding interactions between the carboxylic acid and the deprotonated carboxylate group to give one-dimensional zigzag chains. The asymmetric unit of the neutral bcbpy consists of one-half of the bcbpy and two water molecules. In contrast to the Hbcbpy(+) monocation, the neutral bcbpy molecule contains two pyridinium rings that are coplanar with each other and a carboxylate group with similar C-O bond lengths. The molecules are connected by intermolecular hydrogen-bonding interactions between water molecules and carboxylate groups, forming a three-dimensional hydrogen-bonding network.
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页码:695 / +
页数:12
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