Hexaarylcyclotriplumbane: a molecule with a homonuclear ring system of lead.
The reaction of lead(II) bromide with RMgBr, R = 2,4,6-Et3C6H2, furnishes black crystals of hexakis(2,4,6-triethylphenyl)cyclotriplumbane (1) as the first molecule with a homonuclear lead ring. 1 adopts a skewed structure with highly stretched Pb-Pb bond lengths of 3.185 A (average), which indicate that the three-membered ring is formed by weak interactions of 3 singlet plumbylene molecules.
Stabenow
Frank
F
Department of Chemistry, University of Oldenburg, D-26111 Oldenburg, Germany.
Saak
Wolfgang
W
Marsmann
Heinrich
H
Weidenbruch
Manfred
M