2,2′,5,5′‐Tetra‐tert‐butyl‐1,1′‐diazaplumbocene— a Stable Azacyclopentadienyl Compound of Lead

Stable up to 100°, the yellow crystals of the title compound 1 can be obtained in good yields from PbCl2 and the appropriate lithiated pyrrole. Compound 1 shows the bent structure characteristic for metallocenes of elements of Group 14 (the side view is reproduced without tBu substituents) and unlike plumbocene is monomeric in the solid state.