The first tetraaza macrocycle supported zirconium imido complex [Zr(tmtaa)(NC6H3Pri2-2,6(py)] and the new titanium imido base-free analogues [Ti(tmtaa)(NAr)](Ar = Ph or C6H4Me-4) react with isocyanates to give N,N′-bound ureate complexes; these can undergo exchange reactions with excess aryl isocyanate via reversible insertion into the Ti-N(ureate) bond; the X-ray structure of [Zr(tmtaa)-(NC2H3Pri2-2,6)(CO)(NBut)}] is described H2tmtaa = tetramethyldibenzotetraaza[14]annulene).
第一个四氮杂大环支持的
锆咪唑络合物[Zr(tmtaa)(NC6H3Pri2-2,6(py)]和新的无基底
钛咪唑类似物[Ti(tmtaa)(NAr)](Ar = Ph或C6H4Me-4)与
异氰酸酯反应,生成N,N′-结合的
脲酸盐络合物;这些络合物可通过可逆插入Ti-N(ureate)键与过量的芳基
异氰酸酯发生交换反应;[Zr(tmtaa)-