10.1021/om040112p.s001 Noorjahan Begum Noorjahan Begum Shariff E. Kabir Shariff E. Kabir G. M. Golzar Hossain G. M. Golzar Hossain A. F. M. Mahfuzur Rahman A. F. M. Mahfuzur Rahman Edward Rosenberg Edward Rosenberg Investigations of Pyridine-2-thiol as a Ligand:  Synthesis and X-ray Structures of the Mixed Mo−Mn Dinuclear Complex CpMoMn(CO)<sub>3</sub>(μ-CO)(μ-η<sup>2</sup>-pyS)(μ-η<sup>1</sup>-pyS), the Electron-Deficient Trimolybdenum Cluster Cp<sub>3</sub>Mo<sub>3</sub>(μ-CO)<sub>2</sub>(μ-S)(μ<sub>3</sub>-S)(μ-η<sup>2</sup>-NC<sub>5</sub>H<sub>4</sub>), and the Mononuclear CpMo(CO)<sub>2</sub>(μ-η<sup>2</sup>-pyS) American Chemical Society 2005 cyclopentadienyl ligands electron CpMo semibridging CO ligands Mn 2 Mo Compound 4 Compound 3 cyclopentadienyl ligand trimolybdenum compound NC 5 H 4 pyridine pyS 2005-01-17 00:00:00 Dataset https://acs.figshare.com/articles/dataset/Investigations_of_Pyridine_2_thiol_as_a_Ligand_Synthesis_and_X_ray_Structures_of_the_Mixed_Mo_Mn_Dinuclear_Complex_CpMoMn_CO_sub_3_sub_CO_sup_2_sup_pyS_sup_1_sup_pyS_the_Electron_Deficient_Trimolybdenum_Cluster_Cp_sub_3_sub_Mo_sub_3_sub_CO_sub_2_sub_S_sub/3304501 The reaction of Mn<sub>2</sub>(CO)<sub>6</sub>(pyS)<sub>2</sub> (<b>1</b>) with (CpMo(CO)<sub>3</sub>)<sub>2</sub> (<b>2</b>) at 110 °C gives the heterodinuclear complex CpMoMn(CO)<sub>3</sub>(μ-CO)(μ-η<sup>2</sup>-pyS))(μ-η<sup>1</sup>-pyS) (<b>3</b>), the mononuclear molybdenum complex CpMo(CO)<sub>2</sub>(μ-η<sup>2</sup>-pyS) (<b>4</b>), and the 46-electron trimolybdenum cluster Cp<sub>3</sub>Mo<sub>3</sub>(μ-CO)<sub>2</sub>(μ-S)(μ<sub>3</sub>-S)(μ-η<sup>2</sup>-NC<sub>5</sub>H<sub>4</sub>) (<b>5</b>). Compound <b>4 </b>could also be prepared in high yield from the reaction of <b>2</b> with pyridine-2-thiol at 110 °C. Compound <b>3</b> represents a rare example of a Mo−Mn heterodinuclear complex containing a μ-η<sup>2</sup>-pyridine-2-thiolato, a μ-η<sup>1</sup>-pyridine-2-thiolato, and a cyclopentadienyl ligand. The 46-electron compound <b>5</b> represents a unique example of a trimolybdenum compound containing three cyclopentadienyl ligands, an ortho-metalated pyridyl ligand, a capping sulfido, a bridging sulfido, and two semibridging CO ligands. Curiously, although this complex is formally electron deficient, it is unreactive toward two-electron donors. The structures of all the compounds have been unambiguously established by single-crystal X-ray crystallography.