Two saccharinate complexes: [Mn(phen)₂(sac)(H₂O)]⁺·sac^–and [Co(bipy)₂(sac)(H₂O)]⁺·sac^–

Abstract

The title saccharinate complexes, aqua[1,2‐benzisothiazol‐3(2H)‐onato 1,1‐dioxide‐N]bis(1,10‐phenanthroline‐N,N′)man­ganese(II) 1,2‐benz­isothia­zol‐3(2H)‐onate 1,1‐dioxide,[Mn(C7H4NO3S)(C12H8N2)2(H2O)](C7H4NO3S), and aqua[1,2‐benz­iso­thiazol‐3(2H)‐onato 1,1‐dioxide‐N]­bis­(2,2′‐bi­pyri­dine‐N,N′)­cobalt(II) 1,2‐benz­iso­thia­zol‐3(2H)‐onate 1,1‐di­oxide, [Co­(C7H4NO3S)­(C10H8N2)2­(H2O)]­(C7H4NO3S), have been prepared and their crystal structures determined at 150 K. The structure of the manganese complex consists of repeated alternating [Mn(phen)2(sac)(H2O)]+ cations and non‐coordinated saccharinate anions. The water molecule, bound to manganese as part of a slightly distorted octahedral arrangement, is hydrogen bonded to an O atom of the SO2 group in the saccharinate counter‐ion. In contrast, the cobalt complex has one pseudo‐octahedral [Co(bipy)2(sac)(H2O)]+ cation, with the cobalt‐bound water molecule hydrogen bonded to the N atom of the accompanying free saccharinate anion.

Saccharin complexes of zinc(II) with phenanthroline and 2,9-dimethyl-1,10-phenanthroline: synthesis and characterization

“…This is expected for the more sterically demanding phenanthroline ligands, and the steric hindrances created by phenanthroline chelate rings are similar to those found in the isomorphous manganese analogue reported previously [20]. The hydrogen-bonding geometry of 1 is shown in table 4.…”

“…Because of potential pathological effects, research has expanded to include mono-(imidazole, pyridine) or polycyclic N-donor ligand (2,2 0 -bipyridine, 1,10-phenanthroline) adducts. Several reports about mixed ligand complexes containing saccharinate and these N-donor ligands of various first-row transition metals such as V(II) [17,18], Cr(II) [19], Mn(II) [20][21][22], Fe(II) [23,24], Co(II) [20,25,26], Ni(II) [26][27][28], and Cu(II) [29][30][31][32][33][34][35][36] [29], and [Zn(sac)(bipy) 2 (H 2 O)]sac [40] were determined by single crystal X-ray. Zinc(II)-saccharinate can form a coordination polymer in the presence of a bridging ligand such as pyrazine, as it has been found in [Zn(sac) 2 (m-pyz)(H 2 O)] n [41].…”

The saccharinate anion: a versatile and fascinating ligand in coordination chemistry

“…Some examples have been presented above, in relation to the stoichiometries of the complexes of the heavier lanthanides 36 44 , and [Mn(sac)(ophen) 2 (H 2 O)](sac) 44 .…”

Arene ruthenium bis-saccharinato complexes: Synthesis, molecular structure and catalytic oxidation properties in aqueous solution

“…Recently, it has also been used for ionic liquids [10]. The saccharinate anion has been shown to coordinate to Cr, Zn, V, Pb, Hg, Mn, Co, and the complexes [M(sacc) 2 (OH 2 ) 4 ] (M ¼ Cr, Zn) [11]; [V(sacc) 2 4 ] $ 2 py (py ¼ pyridine) [12]; [Pb(sacc) 2 ] $ H 2 O [13]; [HgCl(py)(sacc)] 2 [14]; [Mn(phen) 2 (sacc)(OH 2 )](sacc), [Co(bipy)2-(sacc)(OH 2 )](sacc) (phen ¼ phenanthroline, bipy ¼ bipyridine) [15]; [Zn(sacc) 2 [16] have been reported.…”