Naslov
Tetraaquabis(pyridine)metal(II)saccharinate tetrahydrate, [M(H_2O)_4(py)_2][sac]_2 ^. 4 H_2O ; M = Co, Ni

Autori
Jovanovski, Gligor ; Grupče, Orhideja ; Naumov, Panče ; Kaitner, Branko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th Slovenian-Croatian Crystallographic Meeting : Book of Abstracts and Programme / Leban, Ivan ; Petrovčič, Nina - Ljubljana : Univerza v Ljubljani, 1998, 54-54

Skup
Slovenian-Croatian Crystallographic Meeting (7 ; 1998)

Mjesto i datum
Radenci, Slovenija, 18.06.1998. - 20.06.1998

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Saccharinates; cobalt; nickel; pyridine adduct; hydrogen bonding

Sažetak
Mainly due to the potential physiological effects, the metal saccharinate compounds containing pyridine as ligand have drawn certain attention of scientists working on the metal saccharinate complexes with aromatic nitrogen bases. Continuing our work on metal complexes of saccharin with different mono- or polymembered ring bases coordinated to the metal we have undertaken a systematic structural and spectroscopic study of pyridine saccharinato complexes with various metals (Mn, Co, Ni, Cu, Hg, Pb). So far we have determined the crystal structure of pyridine saccharinato complexes of ClHg(II), Cu(II), Co(II) and Ni(II). Crystal data. Co(II) compound: C24H34CoN4O14S2. Triclinic, P-1. Mr = 725.60, a = 8.5763(3), b = 9.0164(3), c = 12.1343(3) A, alpha = 77.217(2), beta = 84.902(2), gamma = 63.220(2)o, V = 816.84(3) A3, Dc = 1.475 g cm-3, Z = 1, F(000) = 754, lambda(MoKa) = 0.71073 A, mi = 0.71 mm-1, R = 0.037, wR = 0.064 (w-1 = s2Fo + 0.004Fo2), S = 1.04 for 2951 reflections with Inet gt 3sInet out of 3591 independent diffraction data and 205 variable parameters. Ni(II) compound: C24H34NiN4O14S2, Triclinic, P-1. Mr = 725.39, a = 8.5550(9), b = 9.001(1), c = 12.123(1) A, alpha= 76.704(7), beta = 84.499(7), gamma = 62.993(8)o, V = 809.43(9) A3, Dc = 1.488 g cm-3, Z = 1, F(000) = 756, lambda(MoKa) = 0.71073 A, mi = 0.79 mm-1, R = 0.051, wR = 0.082 (w-1 = s2Fo + 0.006Fo2), S = 1.02 for 2914 reflections with Inet gt 3sInet out of 3537 independent diffraction data and 205 variable parameters. As seen from the crystal data two compounds are isomorphous. Their structures consists of [M(H2O)4(py)2]2+ cations, [sac]- anions and non-coordinated water molecules. The metal atom lies on the inversion center and is octahedrally coordinated by four water oxygens and two pyridine nitrogen atoms. The ions are linked together through the hydrogen bonds of OwˇˇˇOw, OwˇˇˇO and OwˇˇˇN type. All water molecules are included in the hydrogen bonding with the oxygen atoms belonging to the CO and SO2 groups and nitrogen atom from the saccharinato anion. The main characteristic of the structure is the existance of the cavity formed by the hydrogen bonded oxygen atoms belonging to the SO2 group and one of two non-coordinated water molecules.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA