Naslov
Sythesis and Characterization of Carbonyl Complexes of the Group VI Metals with a Macrocyclic Tetraamine Ligand

Autori
Planinić, Pavica ; Meider, Henrika ; Yeh, H. J. C. ; Vikić-Topić, Dražen

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

Izvornik
29^th ICCC. Book of Abstracts / - Lausanne, 1992, 175-175

Skup
29^th International Conference on Coordination Chemistry

Mjesto i datum
Lausanne, Švicarska, 19.07.1992. - 24.07.1992

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
chromium; molybdenum; tungsten; carbonyl complexes; tetraaza macrocycles; NMR;

Sažetak
A derivate of 1, 4, 8, 11-tetraazacyclotetradecane (TA) bearing two pairs of-CH_2P(C_6H_5)_2 groups on the opposite sides of the TA ring, 1, 4, 8, 11-tetrakis(methydiphenylphosphino)-1, 4, 8, 11-tetraazacyclotetradecane (TPTA), is very interesting, potentialy octadentate ligand. In regard to the fact that the metal carbonyl chemistry with TA or its derivatives were lacking until very recently and as a continuation of our work on metal carbonyl chemistry we have undertaken a detailed study of the reaction of molybdenum, tungsten and chromium hexacarbonyls with TPTA. Under gentle reflux conditions the ligand reacts in the appropriate ratio with metal hexacarbonyls in deoxygenated dry alcohol to give crystalline orange-yellow solids of the formula [M(CO)_4]_2TPTA (M = Mo, W, Cr). The new complexes were characterized by elemental analyses, IR, UV/visible and ^1H, ^13C and ^31P NMR spectroscopy, conductivity and magnetic measurements data. The data available indicate that the TPTA ligand does not incorporate metal into the macrocyclic ring. Each metal atom in these binuclear species is coordinated by two phosphorus atoms from the pendant methydiphenylphosphino groups and by four carbonyls in cis octahedral arrangement.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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