Dichlorobis[phosphonic tris(dimethylamide)]manganese(II)

Abstract

In the title compound, [MnCl2(C6H18N3OP)], the MnII atom, on a twofold rotation axis, is bonded to two O atoms from two symmetry‐related hexa­methyl­phospho­sphoramide (HMPA) ligands and two Cl atoms in a distorted tetra­hedral configuration.

A novel amido–pyrophosphate MnIIchelate complex with the synthetic ligand O{P(O)[NHC(CH3)3]2}2(L): [Mn(L)2{OC(H)N(CH3)2}2]Cl2·2H2O

“…The P O groups of one complicated complex and one unavailable CIF were also excluded. The data show that the maximum population of the distribution is in the range 1.46-1.50 Å and, as expected, the P O bonds in complexes tend to be longer than the unligated P O double bond (1.45 Å ; Corbridge, 1995 Jin et al, 2005). In that complex, the Mn II atom is bonded to two O atoms from two hexamethylphosphoramide (HMPA) ligands and two Cl atoms, with a distorted tetrahedral coordination.…”

Phosphorescent Manganese(II) Complexes and Their Emerging Applications

“…Jin and Bortoluzzi et al reported a library of phosphoramide-based manganese(II) complexes 2a-2e shown in Scheme 1. [54][55][56] By using X-ray single crystal diffraction, their chemical structures are fully confirmed and are unambiguously proved to possess tetrahedrally coordinated manganese(II) ion in these complexes. Except for the chlorine-based complex 2a with unclear emission property, at room temperature, these complexes show similar phosphorescence with emission peaks from 516 to 521 nm, which can be attributed to the characteristic 4 T 1 − 6 A 1 radiative transition.…”

“…The organophosphorus/arsenic oxygen derivatives are important class of ligands, which can successfully be used to design the monodentate ligand-based neutral phosphorescent manganese(II) complexes. [52,49,[53][54][55][56][57] The monodentate ligandbased neutral manganese(II) complexes usually consist of two monodentate organophosphorus/arsenic oxide ligands and another two halogen atoms (such as Cl, Br, I). Typical chemical www.advopticalmat.de © 2020 Wiley-VCH GmbH structures of these complexes (1a-1c, 2a-2e, and 3a-3c) are given in Scheme 1.…”

“…The halogen atoms have remarkable influence on both τ and Φ, and the more heavy iodine-based complexes show much shorter τ of 112-188 µs than that of the bromine-based complexes (479-594 µs). [54][55][56] This phenomenon can be explained by the heavy atom effect of halogen atoms. With the atomic weight increasing from Cl to I, the spin-orbit coupling interactions in these complexes become larger and hence result in a reduction in the lifetime of the excited state.…”

“…[57] However, the bromine-based complexes 2b and 2d show moderate quantum efficiencies of 15-19% for phosphorescence, while the iodine-based complexes 2c and 2e exhibit weaker phosphorescence with efficiencies of less than 1% ( Table 1). [54][55][56] The quite low quantum efficiency of the iodine-based complexes may be due to the quenching effect of heavy iodine atom in the complexes.…”