Hydrogen storage capacity of novel mixed ligand complexes of lead(II): Molecular structure of [Pb-2(tsac)(4)(mu-dppe)]


Al-Jibori S. A. , Amen M. M. , Alheety M. A. , KARADAĞ A. , Wagner C.

INORGANIC CHEMISTRY COMMUNICATIONS, vol.125, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 125
  • Publication Date: 2021
  • Doi Number: 10.1016/j.inoche.2021.108444
  • Title of Journal : INORGANIC CHEMISTRY COMMUNICATIONS

Abstract

The complex [Pb(tsac)(2)H2O] has been used as a synthon for the synthesis of a series of lead(II) thiosaccharinate mixed ligand complexes with the tertiary phosphines; PPh3, Ph2P(CH2)(n)PPh2, n = 1, dppm; n = 2, dppe; n = 3, dppp or the heterocyclic; 2-aminobenzothiophene (abtH), 2-acetamidopyrimidine (aampH) and 2-benzimidazolethiol (bimsH). The prepared complexes were characterized using; IR, H-1-, P-31-{H-1} NMR, molar conductivity, elemental analysis in addition, the crystal structure of the complex [Pb-2(tsac)(4)(mu-dppe)] was resolved by x-ray diffraction analysis of a single crystal. [Pb-2(tsac)(4)(mu-dppe)] crystallizes in the triclinic space group P-1 a = 9.0955 (5), b = 11.4197(6), c = 15.3174(7) angstrom, Z = 2 and refined to R-1 = 0.0422. Herein, thiosaccharine shows the ability to coordinate to lead(II) center in a variety of modes, which are monodentate, chelate- bidentate via a nitrogen atom and/ or a sulfur atom of the thiole group. Furthermore, the complexes [Pb(tsac)(2)H2O] and [Pb-2(tsac)(4)(mu-dppe)] were used to examine their ability to store hydrogen. The results show that [Pb(tsac)(2)H2O] and [Pb-2(tsac)(4)(mu-dppe)] are able to store 0.29 and 1.12 wt% H-2, respectively.