Can I read Regio- and stereospecific syntheses and structural characterization of alkyl-substituted 1,3-diene complexes of cyclopentadienylzirconium amidinates of the general formula: (η5-C5Me5)Zr[N(iPr)C(Me)N(iPr)](σ2,π-C4H5R) (R = Me or Et) on EtoBox?

Regio- and stereospecific syntheses and structural characterization of alkyl-substituted 1,3-diene complexes of cyclopentadienylzirconium amidinates of the general formula: (η5-C5Me5)Zr[N(iPr)C(Me)N(iPr)](σ2,π-C4H5R) (R = Me or Et) by Philip P. Fontaine; Albert Epshteyn; Peter Y. Zavalij; Lawrence R. Sita is a Chemistry article available to read on EtoBox.

What is Regio- and stereospecific syntheses and structural characterization of alkyl-substituted 1,3-diene complexes of cyclopentadienylzirconium amidinates of the general formula: (η5-C5Me5)Zr[N(iPr)C(Me)N(iPr)](σ2,π-C4H5R) (R = Me or Et) about?

Alkylation of Cp \* Zr[N( i Pr)C(Me)N( i Pr)](Cl) 2 (Cp \* = g 5 -C 5 Me 5 ) (4) with 2 equiv. of n-hexyllithium in diethylether at À30 °C provided Cp \* Zr[N( i Pr)C(Me)N( i Pr)](n-C 6 H 13 ) 2 (5) in excellent yield. In solution, 5 undergoes thermally induced loss of ''C 6 H 16 '' to provide a 35% isolated yield of the 1,3-hexadiene complex, Cp \* Zr[N( i Pr)C(Me)N( i Pr)](C 4 H 5 Et) (6), in regio-and diastereochemically pure form. Ligand substitution of the g 2 -styrene group in Cp \* Zr[g 2 -CH 2 CH(C 6 H 5 )][N( i Pr)C(Me)N( i Pr)] (3) was achieved using an excess of 2methyl-1,3-butadiene (isoprene) in toluene at 25 °C to provide Cp \* Zr[N( i Pr)C(Me)N( i Pr)](isoprene) (7) in regio-and stereochemically pure form. In similar fashion, an excess of cis,trans-1,3-pentadiene was used to separately prepare the isomeric diene complex Cp \* Zr[N( i Pr)C(Me)N( i Pr)](1,3-pentadiene) (8), once again in regio-and stereospecific fashion. Detailed experimental investigations of the molecular and electronic structures of 6-8, as performed in solution by 1D and 2D NMR spectroscopy and in the solid state by single-crystal X-ray analysis, revealed that the best structural description for th

Who reads Regio- and stereospecific syntheses and structural characterization of alkyl-substituted 1,3-diene complexes of cyclopentadienylzirconium amidinates of the general formula: (η5-C5Me5)Zr[N(iPr)C(Me)N(iPr)](σ2,π-C4H5R) (R = Me or Et)?

Author

Philip P. Fontaine; Albert Epshteyn; Peter Y. Zavalij; Lawrence R. Sita

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)