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617994 
Journal Article 
Syntheses and crystal structures of cis- and trans-copper(II) complexes of L-arginine 
Ruixiang, H; Qing, Y; Fupei, L; Lufang, M; Xiongbing, C; Manbo, Z; Hong, L; Kaibei, Y 
2008 
Yes 
Journal of Coordination Chemistry
ISSN: 0095-8972
EISSN: 1029-0389 
61 
8 
1265-1271 
Two copper(II) complexes of L-arginine, trans-[Cu(l-Arg)2(NO3)]NO3 · 3H2O (1) and {cis-[Cu(l-Arg)2](NO3)2 · 3H2O}n (2) (Arg = arginine) were prepared by reaction of Cu(NO3)2 · 3H2O and L-arginine in acetone and aqueous solution, respectively. X-ray analysis reveals 1 crystallizes in a monoclinic system, P21 with a = 10.3857(15), b = 16.885(3), c = 15.9586(19) Ã…, β = 15.9586(19)°, Z = 4, V = 2654.2(6) Ã…3. The copper(II) centers lie in a distorted N2O3 square-pyramidal environment. While 1 adopts a mononuclear structure, and the axial position occupied by a nitrate with Cu1-O9 = 2.535 Ã… and Cu2-O20 = 2.581 Ã…, 2 features a 1-D infinite chain structure. In 1, adjacent monomeric units connect with each other to give a 2-D layer structure of (4, 4) nets through hydrogen bonds between the guanidinium and carboxylic groups of arginine, and 2-D layers further assemble to a 3-D supermolecular structure via a series of inter-layer hydrogen bonds. [ABSTRACT FROM AUTHOR] Copyright of Journal of Coordination Chemistry is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts) 
COMPLEX compounds; ARGININE; AMINO acids; ACETONE; CARBOXYLIC acids; -arginine; Copper; Crystal structure; L-arginine