Diaquabis[5-(1-oxidopyridin-1-ium-2-yl)-1,2,3,4-tetrazolido]manganese(II) dihydrate

Abstract

In the title compound, [Mn(C6H4N5O)2(H2O)2]·2H2O, the MnII ion is situated on an inversion centre and is coordinated by the O and N atoms of two bis-chelating 5-(2-pyridyl-1-oxide)tetra­zolate ligands and two O atoms of two water mol­ecules in a distorted octa­hedral geometry. All the water H atoms are involved in O—H⋯N and O—H⋯O hydrogen bonds with uncoordinated water O atoms and tetra­zole N atoms, which link the mol­ecules into a three-dimensional network.

A Molybdenum(VI) Complex of 5-(2-pyridyl-1-oxide)tetrazole: Synthesis, Structure, and Transformation into a MoO3-Based Hybrid Catalyst for the Epoxidation of Bio-Olefins

“…The N-O distance of 1.334(2) Å in the complex is slightly longer than that in the free ligand (1.302(5) Å, 1.307(5) Å). Complexes with (H)pto are rare, with only Gd III , Zn II , and Mn II structures [26,29] being reported to date according to a search in the Cambridge Structural Database [30]. While the two M II complexes have an octahedral coordination sphere, they are diaqua complexes with two coordinated pto − molecules.…”

“…This oxidant selectively targets the pyridyl N atom, unlike others such as H 2 O 2 and CH 3 CO 3 H, which form inseparable mixtures of products. The interaction between Hpto and bases originates the anion 5-(2-pyridyl-1-oxide)tetrazolate (pto − ) [26][27][28][29]. To the best of our knowledge, the metallo-organic complexes reported in the literature involve the ligand Hpto as an anion, with lanthanide ions Eu(III) [27,28], Gd(III) [26][27][28], and Tb(III) [27] for luminescence purposes, and transition metal ions Zn(II) [26] and Mn(II) [29].…”

“…The interaction between Hpto and bases originates the anion 5-(2-pyridyl-1-oxide)tetrazolate (pto − ) [26][27][28][29]. To the best of our knowledge, the metallo-organic complexes reported in the literature involve the ligand Hpto as an anion, with lanthanide ions Eu(III) [27,28], Gd(III) [26][27][28], and Tb(III) [27] for luminescence purposes, and transition metal ions Zn(II) [26] and Mn(II) [29]. These structures share common bidentate coordination of pto − to the metal center, specifically N(py)-O-M and N1(tz)-M (py = pyridyl ring, tz = tetrazolate ring).…”