NUCLEOPHILIC-SUBSTITUTION VS ACID-BASE REACTIONS OF [MN(N(SIME3)(2))(2)]CENTER-DOT-2THF - SYNTHESES AND STRUCTURES OF 2[LI(THF)(4)](-)CENTER-DOT-C6H5ME AND [MN(C12H8N)(2)]CENTER-DOT-3THF (THF EQUALS TETRAHYDROFURAN, C12H8N EQUALS CARBAZOL-9-YL)()[MN(C12H8H)(4)](2)

The ion-separated complex 2[Li(thf)(4)](+)[Mn(C12H8N)(4)](2-) 1 has be en obtained from the nucleophilic substitution reaction of [Mn{N(SiMe3 )(2)}(2)].2thf with Li[C12H8N] (1:4 equivalents)(thf = tetrahydrofuran , C12H8N = carbazol-9-yl), and the molecular species [Mn(C12H8N)(2)].3 thf 2 from the acid-base reaction of [Mn{N(SiMe3)(2)}(2)].2thf and C12 H8NH (1:2 equivalents). They are among the few amidomanganese(II) comp lexes containing simple (sterically undemanding) dialkyl- or diaryl-am ido groups to be characterised. The crystal structures of both were de termined: 1 contains the fi;st tetraamidomanganese(II) dianion and 2 p ossesses the highest co-ordination number for Mn-II in such a compound .