Piano-stool lutetium amido and imido compounds supported by a constrained bis (oxazoline) cyclopentadienyl ligand
{BoMCptet} Lu (CH2Ph) 2 (1; BoMCptet= MeC (OxMe2) 2C5Me4; OxMe2= 4, 4-dimethyl-2-
oxazoline) was prepared in 95% yield from the reaction of BoMCptetH and Lu (CH2Ph)
3THF3. Compound 1 reacts with 1 or 2 equiv of H2NCH2R (R= C6H5, 1-C10H7) to give the
corresponding imido complexes [{BoMCptet} LuNCH2R] 2 (R= C6H5 (2a), 1-C10H7 (2b)) or
amido complexes {BoMCptet} Lu (NHCH2R) 2 (R= C6H5 (3a), 1-C10H7 (3b)). Once
isolated, the imido species are insoluble in nonprotic organic solvents. Crystallographic …
oxazoline) was prepared in 95% yield from the reaction of BoMCptetH and Lu (CH2Ph)
3THF3. Compound 1 reacts with 1 or 2 equiv of H2NCH2R (R= C6H5, 1-C10H7) to give the
corresponding imido complexes [{BoMCptet} LuNCH2R] 2 (R= C6H5 (2a), 1-C10H7 (2b)) or
amido complexes {BoMCptet} Lu (NHCH2R) 2 (R= C6H5 (3a), 1-C10H7 (3b)). Once
isolated, the imido species are insoluble in nonprotic organic solvents. Crystallographic …
{BoMCptet}Lu(CH2Ph)2 (1; BoMCptet = MeC(OxMe2)2C5Me4; OxMe2 = 4,4-dimethyl-2-oxazoline) was prepared in 95% yield from the reaction of BoMCptetH and Lu(CH2Ph)3THF3. Compound 1 reacts with 1 or 2 equiv of H2NCH2R (R = C6H5, 1-C10H7) to give the corresponding imido complexes [{BoMCptet}LuNCH2R]2 (R = C6H5 (2a), 1-C10H7 (2b)) or amido complexes {BoMCptet}Lu(NHCH2R)2 (R = C6H5 (3a), 1-C10H7 (3b)). Once isolated, the imido species are insoluble in nonprotic organic solvents. Crystallographic characterization reveals dimeric [{BoMCptet}LuNCH2(1-C10H7)]2 in the solid state. The reaction of 1 and NH3B(C6F5)3 affords crystallographically characterized {BoMCptet}Lu{NHB(C6F5)2}C6F5. This species is proposed to form via a transient lutetium imido, which undergoes C6F5 migration to the lutetium center.
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