Naslov
Role of the group 12 metals in tuning the structural motif: From complexes to halometallate salts of 3-carbamoyl-1-methylpyridinium

Autori
Soldin, Željka ; Đaković, Marijana ; Petrović Peroković, Vesna ; Bošnjaković, Ksenija ; Popović, Zora

Izvornik
Polyhedron (0277-5387) 52 (2013); 689-698

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
3-carbamoyl-1-methylpyridinium; group 12 metal complexes; vibrational spectroscopy; X-ray structure; hydrogen bonding

Sažetak
Reactions of the group 12 metal bromides and iodides with 3-carbamoyl-1-methylpyridinium iodide (LI), the quaternary salt of the nicotinamide, were investigated. The [ZnBr2(L–H)2] (1), [ZnI2(L– H)2] (2), [L]2[CdBr4] (3), [L]2[CdI4] (4), {; ; ; ; [L] [HgBr3]}; ; ; ; n (5) and {; ; ; ; [L][HgI3]}; ; ; ; n (6) have been prepared and characterized by vibrational spectroscopy (IR, Raman) and thermal methods (TG/DSC), and single crystal structures of 1, 2, 4 and 6 were determined by X-ray structure analysis. The reactions of zinc(II) halides performed under solvothermal conditions afforded complex compounds (1 and 2), where coordination of 3-carbamoyl-1- methylpyridinium was possible only upon deprotonation of the amide nitrogen. In both complexes, zinc(II) exhibits tetrahedral coordination geometry with two halide ions and two amide nitrogens in the coordination sphere. For cadmium(II) and mercury(II) halides, reactions performed at ambient as well as solvothermal conditions led to the preparations of tetra- (4) or trihalometallate salts (6) of 3-carbamoyl-1- methylpyridinium, respectively. In cadmium compound (4) monomeric, [CdI4]2–, while in mercury(II) compound (6) polymeric, [HgI3]n–, structures are found. Furthermore, in 4 and 6, the self-complementary amide hydrogen bonds appear to be the main driving force for establishing their crystal structures ; in 1 and 2, after deprotonation of the amide nitrogen, the formation of the amide hydrogen bonds does not occur.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

Napomena
Posvećeno Alfredu Werneru povodom 100-te godoišnjice dodjele Nobele nagrade ua kemiju 1913.

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