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Abstract
( i Pr 2 N) 2 PCl ( 3 ) reacts with P(SiMe 3 ) 2 Li yielding crystalline ( i Pr 2 N) 2 P–P(SiMe 3 ) 2 ( 1 ). Compound 1 crystallizes in the orthorhombic space group Pbca. The lithiation of 1 with BuLi yields ( i Pr 2 N) 2 P–P(SiMe 3 )Li ( 2 ). Compound 2 reacts with 3 with the formation of ( i Pr 2 N) 2 P–P(SiMe 3 )–P(N i Pr 2 ) 2 ( 4 ) in high yield. Attempts to lithiate 4 with BuLi in THF solution in order to obtain ( i Pr 2 N) 2 P–PLi–P(N i Pr 2 ) 2 were unsuccessful, probably due to strong electron donation of the i Pr 2 N groups into the P-P-P skeleton in 4 .
Dedicated to Professor Marian Mikołajczyk from the CBMiM PAN in Łódź, Poland, on the occasion of his 70th birthday.
W. D.-B. and J. P. thank the Polish State Committee of Scientific Research (project No. 1 T09A 148 30) for financial support.
