Synthesis and reactivity of titanium(IV)-salen complexes containing oxygen and chloride ligands

被引：36

作者：

Chen, HY ^{[1
]}

White, PS ^{[1
]}

Gagné, MR ^{[1
]}

机构：

[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 24期

关键词：

D O I：

10.1021/om980414p

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of in situ-generated Ti((OPr)-Pr-i)(2)(X)(2) (X = OAr, OTf) with H(2)salen or H(2)salen* yields the stable, well-characterized Ti(salen)X-2 series of complexes. Ti(salen*)(OTf)(2) could also be synthesized by reacting the previously unknown Ti(salen*)Cl-2 with TMSOTf or AgOTf. The ditriflates could be converted back to the aryloxides upon reaction with 2 equiv of NaOAr. Ti(salen)(4-tert-butyphenoxy)(2) was characterized by X-ray crystallography and found to contain a pseudoplanar salen ligand with two axially coordinated aryloxide ligands. H(2)salen and H(2)salen* were also found to cleanly react with in situ-generated Ti((OPr)-Pr-i)(3)(X) (X = OC(O)R, OTf) to yield the unsymmetrically substituted Ti(salen)((OPr)-Pr-i)(X) and Ti(salen*)((OPr)-Pr-i)(X) complexes, respectively. In the case of X = OTf, the isopropoxide ligand could be cleanly protonated with 4-tert-butylphenol to yield Ti(salen)(OAr)(OTf) in high yield. This complex could also be accessed by the comproportionation reaction of Ti(salen)(OAr)(2) and Ti(salen)(OTf)(2).

引用

页码：5358 / 5366

页数：9

共 66 条

[1] PREPARATION AND PROPERTIES OF SOME CHLOROTITANIUM CARBOXYLATES - X-RAY CRYSTAL AND MOLECULAR-STRUCTURES OF [(TICL3(O2CCME3))3] AND [TI2CL7(O2CR)(RCO2H)] (R = P-CLC6H4 OR CH = CHME) [J].