The preparation and characterization of volatile derivatives of trivalent metals using fluorinated alkoxide ligands. X-ray structures of [Sc{OCH(CF3)2}3(NH3)2]2, [Pr{OCMe(CF3)2}3(NH3)2]2, [Y{OCMe(CF3)2}3(thf)3] and [Pr{OCMe2(CF3}3]3

Abstract From the reaction of fluorinated alcohols R'OH [R' (CF 3 ) 2 CH, (CF 3 )Me 2 C or (CF 3 ) 2 MeC] with metal tri-(bis-trimethylsilylamides) [M{N(SiMe 3 ) 2 } 3 ] (M  Sc, Y, La or Pr) in benzene, thf or diethyl ether, volatile compounds of formulae [M(OR') 3 (NH 3 ) x ] (X = 0-3), M(OR') 3 (thf) 3 and M(OR') 3 (Et 2 O) x ( x = 0.33 or 0.5) have been isolated. X-ray crystal structures were determined for [SC{ 2 OCH(CF 3 ) 2 } 6 (NH 3 ) 4 ], [Pr 2 {OCMe (CF 3 ) 2 } 6 (NH 3 ) 4 ], [Y{OCMe(CF 3 ) 2 } 3 (thf) 3 ], [La{OCMe(CF 3 ) 2 } 3 (thf) 3 ] and [Pr 3 {OCMe 2 (CF 3 ) 2 } 9 ].