A new ligating mode for the anions of the type [R2P(S)NP(S)R2]−: study of the interaction of [K{Me2P(S)NP(S)Me2}] with the early transition halometalcarbonyl, [BrMn(CO)5]

The thermal reaction of [BrMn(CO)5] with [K{Me2P(S)NP(S)Me2}] afforded the dinuclear complex [Mn2(CO)6{Me2P(S)NP(S)Me2-μ-S,S′}2] (1). The single-crystal X-ray analysis of 1 shows that this complex is formed by three fused cycles: one four-membered ring and two six-membered rings. The latter show a pseudochair conformation with the Mn and N atoms at the apices. There are two molecules, 1 and 1a, in the unit cell crystallographically independent with identical conformation.