The tribenzyl complex (Pri2tacn)Zr(CH2Ph)3 eliminates toluene upon heating with concomitant ring-opening of the anionic ancillary macrocycle to yield [CH2![[double bond, length half m-dash]](http://hg.y866.cn/compound/lib/scimg/usr/1/B005675H.jpg)
CHNCH2- CH2N(Pri)CH2CH2NPri ]Zr(CH2Ph)2; the latter features a new class of dianionic pincer ligand.
