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We give a complete classification of finite-dimensional simple Novikov algebras and their irreducible modules over an algebraically closed field with prime characteristic. Moreover, we introduce ''Novikov᎐Poisson algebras'' and their tensor theory. Our tensor theory enables us to understand better certain finite-dimensional simple Novikov algebras and their irreducible modules. ᮊ 1996 Academic Press, Inc.

A series of amine bis(phenolato)lanthanide methyl and amido complexes were synthesized by general salt metathesis reaction in this paper. The reaction of anhydrous lanthanide trichlorides with 1 equiv of sodium amine bis(phenolatein THF at room temperature gave the amine bis(phenolate) lanthanide chlorides LLnCl(THF) (Ln ) Yb (1), Ln ) Er ( 2)). Complexes 1 and 2 can be used as starting materials to prepare amine bis(phenolate) lanthanide derivatives. Complexes 1 and 2 reacted with lithium methyl and lithium amide, respectively, to give the corresponding lanthanide methyl and amido products LLnMe(THF) (Ln ) Yb (3), Ln ) Er ( 4)) and LLnNPh 2 (THF) (Ln ) Yb (5), Ln ) Er ( 6)). These complexes were well characterized by elemental analyses and IR spectra. The definitive molecular structures of complexes 1, 2, 3, 5, and 6 were provided by single-crystal X-ray analyses. Reactivity studies of complexes 3, 5, and 6 have shown them to be efficient initiators for the ring-opening polymerization of -caprolactone.