Irans-diazene

B. Different Stabilization Effects in Coordinated cis- and irans-diazene... [Pg.69]

We find that cis-diazene is more strongly bound in both model complexes than irans-diazene. This is apparent in view of the Fe-N bond distances For 1(N2H2) we find a about 4 pm shorter Fe-N distance for the cis-isomer when compared with the trans-form, while this distance is 2-3 pm shorter in cis-2(N2H2) than in trans-2(N2H2). [Pg.69]

Reductive Transposition of Allylic Alcohols. Similar to the synthesis of allenes from propargylic alcohols, the Mitsunobu displacement of allylic alcohols with IPNBSH followed by hydrolysis, diazene formation, and sigmatropic loss of dinitrogen provides reductively transposed alkenes. This methodology has proven effective for the reductive transposition of a variety of allylic alcohols (eq 2). The overall transformation provides the desired olefin with high selectivity in the formation of the irans-alkene (eq 3). ... [Pg.24]

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