Structural study of monoaquabis(pyridine)bis(saccharinato)copper(II), [Cu(H2O)(py)2(sac)2]

✍ Scribed by G. Jovanovski; P. Naumov; O. Grupče; B. Kaitner

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 539 KB
• Volume: 35
• Category: Article
• ISSN: 0992-4361
• DOI: 10.1016/s0992-4361(98)80004-0

✦ Synopsis

The structure of monoaquabis(pyridine)bis(saccharinato)copper(II), [Cu(H20)(py)2(sac)2], has been investigated by X-ray diffraction and infrared spectroscopy. The complex crystallizes in the orthorhombic space group I ha2 with the following unit cell parameters: a = 9.4874(7), b = 21.545(1), c = 13.164(1) ~, V = 2690.8(4)/~~, Dc = 1.491 g cm 3, Z = 4,/? = 0.025, wE = 0.036. The structure consists of individual [Cu(H20)(py)2(sac)2] molecules. The copper atom is bonded to two pyridine and two saccharinato nitrogen atoms as well as to the water oxygen atom forming a distorted square pyramid. The copper atom lying on a twofold rotation axis is 0.2209(7) ,~. above the basis square plane formed by the four nitrogen atoms. The bond distances in the coordination polyhedron are: Cu-Nll 2.032(2)/~, Cu-N21 2.040(2) ~, Cu-OW1 2.177(2) A. The N-Cu-N angles amount 88.67(8) and 89.97(8) ° as well as 167.36(9) and 167.69(8) ° , while the values of the OWl-Cu-N angles are 96.16(6) and 96.32(6) ° . The FT infrared spectral features in the region of the OH, OD, CO and SO2 stretching vibrations are discussed and correlated with the data obtained by X-ray diffraction.

*py denotes pyridine while sac stands for saccharin. The systematic name of saccharin is 1,2-benzisothiazol-3(2H)-one 1,1-dioxide.