0181780 - UFCH-W 20030220 RIV CH eng J - Článek v odborném periodiku
Hartmann, H. - Sarkar, B. - Kaim, W. - Fiedler, Jan
Electron Transfer Reactions of (C5R5)2 (CO)2Ti (R = H or Me) with TCNE or TCNQ. Spectroelectrochemical Assignment of Metal and Ligand Oxidation States in [(C5Me5)2(CO)Ti(TCNX)]2-/-/o/+.
Journal of Organometallic Chemistry. Roč. 687, - (2003), s. 100-107. ISSN 0022-328X. E-ISSN 1872-8561
Grant CEP: GA MŠMT OC D15.10; GA MŠMT OC D14.20
Výzkumný záměr: CEZ:AV0Z4040901
Klíčová slova: electron transfer * spectroelectrochemistry * titanium compounds
Kód oboru RIV: CG - Elektrochemie
Impakt faktor: 2.042, rok: 2003

The TCNX ligands TCNE (tetracyanoethene) and TCNQ (7,7,8,8,-tetracyano-p-quinodimethane) react instantaneously with (C5R5)2(CO)2Ti, R=H or Me, to yield highly air-sensitive mononuclear complexes (C5R5)2(CO)Ti(TCNX) of which the soluble species (R%Me) were characterized also in the oxidized and reduced forms through cyclic voltammetry, EPR, IR and UV-vis spectroelectrochemistry. While oxidation at rather low potentials yields labile carbonyltitanium(IV) species of the TCNX*- ligands, the reduction occurs stepwise at unusually negative potentials, first on the ligand (to yield coordinated TCNX2-) and then on the metal (to formTI"). For the neutral complexes (C5R5)2(CO)Ti2+q(TCNX-q) the results support a rather large amount of charge transfer.
Trvalý link: http://hdl.handle.net/11104/0078299