ATR-FTIR spectroscopic investigation of the cis- and trans-bis-(alpha-amino acids) copper(II) complexes

作者：Berestova Tatyana V^*; Kuzina Lyudmila G; Amineva Natalya A; Faizrakhmanov Ilshat S; Massalimov Ismail A; Mustafin Akhat G

来源：Journal of Molecular Structure, 2017, 1137: 260-266.

DOI：10.1016/j.molstruc.2017.02.023

• Bis-(alpha-amino acids) copper(II) complexes
• Cis-, Trans -isomers
• Glycine
• S-alanine
• R,S-valine
• (+/-)-Threonine
• R,S-phenylalanine
• ATR-FFIR-spectroscopy
• XRD
• Bond distances

The crystalline phases of the trans-(a) and cis-(b)-isomers of bis-(alpha-amino acids) copper(II) complexes [Cu(L-b)(2)] 1-5 (L-b- bidentate ligand: gly (1), S-ala (2), R,S-val (3), (+/-)-thr (4), R,S-phe (5)) were studied by ATR-FTIR spectroscopy in the mid region IR spectrum. It was established that asymmetric v(as)(COO) and symmetric v(s)(COO) stretching vibrations of carboxylic groups of 1-5 are sensitive to change of the geometric structure and have a different maxima for the trans(a)- and cis(b)-isomers. It found that v(as)(COO) and v(s)(COO) stretching vibrations of cis-isomers are broadened and shifted to longer wavelengths (b) as compared with trans-isomers (a). Shown that peculiarities of crystal packing molecules of geometric isomers may affect on carboxylate stretching vibration bis-alpha-amino acids complexes copper(II) 1-5 a,b.

• 出版日期2017-6-5