TY - JOUR
T1 - Synthesis and characterization of binuclear transition metal-rhenium(VII) complexes with bridging cyanide ligands
AU - Gonçalves, Isabel S.
AU - Kühn, Fritz E.
AU - Lopes, André D.
AU - Parola, A. Jorge
AU - Pina, Fernando
AU - Sotomayor, João
AU - Romão, Carlos C.
PY - 1998/6/15
Y1 - 1998/6/15
N2 - Reacting transition metal complexes in low oxidation states, containing one or two cyanide ligands, with methyltrioxorhenium(VII) leads to bridged mixed metal compounds in good yields. The Re(VII) core is then surrounded by five or six ligands, respectively. The strength of these CN bridges and thus the stability of the newly generated bimetallic compound strongly depends on the donor strength of the ligands surrounding of the Cr/Mo/W or Fe moiety. The stability of the mixed metal molecules is reflected in the temperature dependent behavior of their 17O-NMR spectra, in their IR (Re=O) stretching frequencies and force constants, as well as several other spectroscopic data. UV-vis absorption spectra show the appearance of charge transfer bands. In the case of the mixed Mo/Re complexes the 95Mo-NMR spectroscopy is also a helpful tool to examine the donor capability of the Mo moiety. The described compounds also show photosensitivity.
AB - Reacting transition metal complexes in low oxidation states, containing one or two cyanide ligands, with methyltrioxorhenium(VII) leads to bridged mixed metal compounds in good yields. The Re(VII) core is then surrounded by five or six ligands, respectively. The strength of these CN bridges and thus the stability of the newly generated bimetallic compound strongly depends on the donor strength of the ligands surrounding of the Cr/Mo/W or Fe moiety. The stability of the mixed metal molecules is reflected in the temperature dependent behavior of their 17O-NMR spectra, in their IR (Re=O) stretching frequencies and force constants, as well as several other spectroscopic data. UV-vis absorption spectra show the appearance of charge transfer bands. In the case of the mixed Mo/Re complexes the 95Mo-NMR spectroscopy is also a helpful tool to examine the donor capability of the Mo moiety. The described compounds also show photosensitivity.
KW - Cyanide bridges
KW - Fe/Re binuclear complexes
KW - Mo/Re binuclear complexes
KW - Re(VII) oxides
UR - http://www.scopus.com/inward/record.url?scp=0032525557&partnerID=8YFLogxK
U2 - 10.1016/S0022-328X(98)00495-1
DO - 10.1016/S0022-328X(98)00495-1
M3 - Article
AN - SCOPUS:0032525557
SN - 0022-328X
VL - 560
SP - 117
EP - 124
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -