Bent metallocenesとは 意味・読み方・使い方

Bent metallocenes were brought to the forefront organometallic chemistry shortly after the discovery of ferrocene in 1951. Ferrocene (I) is a transition metal complex in which an Iron (Fe) atom is sandwiched between two parallel cyclopentadienyl (Cp) rings. In this structure the metal coordinates to the π-electron system of the ring instead of a particular atom. These type compounds are now commonly referred to as metallocenes. In bent metallocenes, the ring systems coordinated to the metal are not parallel, but are tilted at an angle. How much the angle is tilted or bent is compound specific and is determined by steric and electronic properties. Some of the first bent metallocenes were introduced by Wilkinson and Birmingham, most notably their report of Cp₂TiCl₂ (II) and Cp₂ZrCl₂ (III).