SYNTHESES AND STRUCTURAL STUDIES OF 2 ADDUCTS OF CADMOCENE, [CDCP(2).TMEDA] AND [CDCP(2).PMDETA] (TMEDA=ME(2)NCH(2)CH(2)NME(2), PMDETA=(ME(2)NCH(2)CH(2))(2)NME)
D. Barr et al., SYNTHESES AND STRUCTURAL STUDIES OF 2 ADDUCTS OF CADMOCENE, [CDCP(2).TMEDA] AND [CDCP(2).PMDETA] (TMEDA=ME(2)NCH(2)CH(2)NME(2), PMDETA=(ME(2)NCH(2)CH(2))(2)NME), Journal of organometallic chemistry, 493(1-2), 1995, pp. 175-179
Cp(2)Cd.TMEDA 1 and Cp(2)Cd.PMDETA 2 have been synthesized and charact
erized by spectroscopic studies and by X-ray diffraction studies at lo
w-temperature (153 K). The adducts are present in the crystals as mono
nuclear complexes. When the denticity of the Lewis base ligands in the
se adducts is increased (from two in 1 to three in three in 2) the Cd2
+ centre requires less electron density from the Cp ligands and the ha
pticity changes from eta(2-) in 1 to eta(1-) in 2. Complexes 1 and 2 a
re the first compounds for which pi-bonding of Cp ligands to Cd2+ has
been observed in the solid state.