Abstract
The reactions of a C,N-chelated ((L-CN)(2)M, where L-CN is 2-((dimethylamino)methyl)phenyl and M is Sn (1) or Pb (2)) stannylene and plumbylene with di-n-butylbis(eta(5)-cyclopentadienyl)zirconium (3) were studied. In the case of the stannylene, the trinuclear carbene-like complex [(L-CN)(2)Sn](2)CP2Zr (4) was isolated as the major product.
The second product isolated resultedfirom transmetalation of the CN-chelating ligand from tin to zirconium, followed by 1-butene coupling to the coordinated aryne (C,N-chelating ligand) (5). In the lead case, the major product was the complex 5.
Byproducts were elemental lead, thefiree ligand ((LH)-H-CN), butane, and 1-butene. The oxidation of 4 by oxygen gave the six- trioxatrizircona cyclic complex (6) and an eight-membered tetraoxa tetrastanna cyclic complex (7).