14633-92-2Relevant articles and documents
Synthesis, Characterization, and Reactivity of Functionalized Trinuclear Iron-Sulfur Clusters - A New Class of Bioinspired Hydrogenase Models
Kaiser, Manuel,Kn?r, Günther
, p. 4199 - 4206 (2015)
The air- and moisture-stable iron-sulfur carbonyl clusters Fe3S2(CO)7(dppm) (1) and Fe3S2(CO)7(dppf) (2) carrying the bisphosphine ligands bis(diphenylphosphanyl)methane (dppm) and 1,1′-bis
Rapid Transfer of Selenium from Tertiary Phosphine Selenides to Tertiary Phosphines
Brown, Douglas H.,Cross, Ronald J.,Keat, Rodney
, p. 871 - 874 (1980)
Selenium transfer between PR3Se and PR3 in solution is rapid on the n.m.r. time scale, and a bimolecular process is indicated.Mixtures of Ph2P(Se)C2H4(Se)PPh2, Ph2(Se)C2H4PPh2, and Ph2PC2H4PPh2 display similar variable-temperature 1H n.m.r. characteristics and their methylene-proton signals coalesce at elevated temperatures.The compound Ph2P(Se)CH2(Se)PPh2 reacts immediately on mixing with Ph2PCH2PPh2 to give exclusively Ph2P(Se)CH2PPh2, whereas solutions of Ph2P(Se)C2H4(Se)PPh2 and Ph2PC2H4PPh2 equilibrate with Ph2P(Se)C2H4PPh2 in 1:1:2 proportions, respectively.The sulphur analogues behave similarly, but react much more slowly.Selenium reacts at ambient temperature with Ph2P(S)CH2PPh2 to form only Ph2P(S)CH2(Se)PPh2, but the action of sulphur on Ph2P(Se)CH2PPh2 leads to a mixture of Ph2P(Se)CH2(Se)PPh2, Ph2P(Se)CH2(S)PPh2, and Ph2P(S)CH2(S)PPh2.Controlling influences and synthetic implications of these reactions are discussed.
Reactions of a Dilithiomethane with CO and N2O: An Avenue to an Anionic Ketene and a Hexafunctionalized Benzene
Xu, Maotong,Wang, Tongtong,Qu, Zheng-Wang,Grimme, Stefan,Stephan, Douglas W.
supporting information, p. 25281 - 25285 (2021/10/25)
Synthesis of value-added products from simple C1 feedstocks is an attractive alternative avenue to traditional fossil fuels. Hexa-substituted benzene derivatives are highly useful molecules but are often challenging to prepare. Herein, we report that the lithium complex [(Ph2P(S))2CLi2(THF)]2 1 reacts with CO lead to C?C bond formation and migration of a Ph2P(S)-fragment affording 2. Subsequent reaction with N2O results in oxidative cleavage of a P?C bond affording [Ph2P(S)OLi(THF)2]2 4 and the anionic ketene-derivative Ph2P(S)CCOLi(THF)2 5. Heating 5 prompts cyclotrimerization giving the hexa-substituted benzene derivative [Ph2P(S)CCOLi(THF)2]3 6 regioselectively. This transition metal-free protocol to a hexa-substituted benzene is viable on a gram scale and permits the incorporation of 13C labels. The mechanisms of these reactions are detailed via extensive DFT computations.
Synthesis and redox behaviour of the chalcogenocarbonyl dianions [(E)C(PPh2S)2]2?: Formation and structures of chalcogenchalcogen bonded dimers and a novel selone
Konu, Jari,Chivers, Tristram,Tuononen, Heikki M.
experimental part, p. 12977 - 12987 (2011/02/22)
The lithium salts of the chalcogenocarbonyl dianions [(E)C(PPh 2S)2]2? (E=S (4b), Se (4c)) were produced through the reactions between Li2[C(PPh2S)2] and elemental chalcogens in the presenc
