Gilliard, Robert J.; Suter, Riccardo; Schrader, Erik; Benko, Zoltan; Rheingold, Arnold L.; Grutzmacher, Hansjorg; Protasiewicz, John D. published the article 《Synthesis of P2C2O2 and P2CO via NHC-mediated coupling of the phosphaethynolate anion》. Keywords: heterocyclic carbene mediated coupling phosphaethynolate anion; crystal structure mol phosphorus heterocycle diphosphorus compound optimized.They researched the compound: 2-Chloro-1,3-bis(2,6-diisopropylphenyl)-1H-imidazol-3-ium chloride( cas:1228185-09-8 ).Synthetic Route of C27H36Cl2N2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1228185-09-8) here.
The reaction of the chloroimidazolium chloride salt, [NHC-Cl][Cl], NHC = C{N(2,6-iPr2C6H3)CH}2 (1) with two equivalent of sodium phosphaethynolate, Na[OCP]·(dioxane)2.5, results in the formation of NHC-{cyclo-(CO)-P2-C(O)} (2) and NHC-P2-C(O)-NHC (3). Notably, in the presence of free NHC ligand, compound 2 converts to compound 3 via extrusion of CO at elevated temperatures The nature of the bonding in these complexes was probed computationally and spectroscopically.
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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics