136655-43-1

Basic information

• Product Name: (2S,3S)-(-)-bis(diphenylphosphino)butane radical cation
• CAS NO: 136655-43-1
• Molecular Weight: 426.478
• Mol File: 136655-43-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (2S,3S)-(-)-bis(diphenylphosphino)butane radical cation(CAS DataBase Reference)
• NIST Chemistry Reference: (2S,3S)-(-)-bis(diphenylphosphino)butane radical cation(136655-43-1)
• EPA Substance Registry System: (2S,3S)-(-)-bis(diphenylphosphino)butane radical cation(136655-43-1)

Safety Data

• Hazardous Substances Data: 136655-43-1(Hazardous Substances Data)

Upstream product

• 64896-28-2 (2S,3S)-2,3-bis(diphenylphosphino)butane 

Downstream Products

• 113009-11-3 {Mo₂(MeCO₂)2(2S,3S)-bis(diphenylphosphino)butane(MeCN)2}{BF₄}2 

Relevant articles and documents

Radical Cations of Bis(diphenylphosphino) Derivatives (Ph2P-R-PPh2): The Formation of Localized, Cyclic, and Dimeric Configurations. An ESR and Quantum Chemical Study

A matrix ESR study on radiogenic radical cations of Ph2P-R-PPh2 derivatives with various linkers (R) is presented.The experiments show that in a frozen dichloromethane solution the radical cations can adopt localized (Ph2PR*+), cyclic , and dimeric (Ph2RP*-PRPh2+) configurations, depending on the nature of the linker.The cyclic and dimeric products are formed in the reaction of a localized cation with a second free-electron pair, resulting in an intra- or intermolecular three-electron P-P ?* bond, respectively.The formation of the cyclic structure, with a strongly bent P-P ?* bond, requires a specific proximate position of the two phosphine moieties in the precursor molecule.The mutual orientation of the two free-electron pairs of the precursors is assessed by NMR via the nJPP spin-spin coupling constant.Ab initio UHF quantum chemical calculations at the 3-21G*/SCF level support the assignments.