Seven- and eight-coordinated complexes of Mo(V) and Mo(IV) with 2-amino-1-carbodithioato ligands: synthesis, spectra and electrochemistry

Electrochemical half-wave potentials, charge-transfer absorption, ESR and magnetic properties are reported for a series of seven-coordinated Mo(V) (1a–d) and eight-coordinated Mo(IV) (2a–d) complexes with 2-alkylaminocyclopent-1-ene-1-dithiocarboxylato ligands (HL). The Mo(IV) compounds constitute the first reported example of a series of complexes with MoS8 chromophore having a spin-triplet ground state. Electrochemical oxidation of 2c is quite interesting as it involves a single-step reversible two-electron transfer involving an Mo(IV)-Mo(VI) couple.