In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2004, No. 10 ( 2004-05), p. 2167-2172
Abstract:
Two methods to synthesize homoleptic guanidinate lanthanide complex are described. The samarium guanidinate complex [Sm{Ph 2 NC(NCy) 2 } 3 ]·2C 7 H 8 ( 1 ) can be synthesized by the metathesis reaction of lithium guanidinate with anhydrous samarium trichloride in a 3:1 molar ratio. The analogous complexes [Ln{Ph 2 NC(NCy) 2 } 3 ]·2C 7 H 8 [Ln = Yb ( 2 ), Nd ( 3 )] can also be synthesized by the insertion reaction of N , N ′‐dicyclohexylcarbodiimide into the Ln−N bond of [(THF) 4 Li][Ln(NPh 2 ) 4 ] in a 3:1 molar ratio in good yield. Complexes 1 − 3 were characterized by elemental analysis, IR and 1 H NMR spectroscopy. The molecular structures of complexes 1 and 3 were further determined by X‐ray diffraction techniques. These complexes showed high activity for the ring‐opening polymerization of trimethylene carbonate (TMC), giving polymers with M w / M n ranging from 1.41−1.73. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2004:10
DOI:
10.1002/ejic.200300856
Language:
English
Publisher:
Wiley
Publication Date:
2004
detail.hit.zdb_id:
1475009-0
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