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Triple Hydrogen Atom Abstraction from Mn-NH3 Complexes Results in Cyclophosphazenium Cations

Journal Article · · Chemical Communications
DOI:https://doi.org/10.1039/C9CC06915A· OSTI ID:1614923

All three hydrogen atoms of the NH3 ligand of [Mn(depe)2(CO)(NH3)]+ are abstracted in reactions with 2,4,6-tri-tert-butylphenoxyl radical, resulting in the isolation of a rare cyclophosphazenium cation [(Et2P(CH2)2PEt2)N]+, in 76% yield. Similar reactions are observed for [Mn(dppe)2(CO)(NH3)]+. Computational studies suggest that insertion of NH into a Mn-P bond provides a strong thermodynamic driving force. Contextualization of this surprising reaction in the paucity of NH3 oxidation by molecular complexes provides insights on catalyst design and breaking strong N-H bonds.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Molecular Electrocatalysis (CME); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1614923
Report Number(s):
PNNL-SA-144932
Journal Information:
Chemical Communications, Journal Name: Chemical Communications Journal Issue: 93 Vol. 55
Country of Publication:
United States
Language:
English

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