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Updated: Jan 18, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
A tetraphosphino-bis(s-triazine) from cyanuric chloride and Ph2PH: new unexpected tandem C-C/C-P coupling reaction
Alexander V Artem'ev1, Maria P Davydova1, Anton V Kuzmin2
1Nikolaev Institute of Inorganic Chemistry, SB RAS, 3, Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia. chemisufarm@yandex.ru.
Abstract:
Serendipitous synthesis of 4,4',6,6'-tetrakis(diphenylphosphino)-2,2'-bi(s-triazine) (Tr2P4) - a novel promising polyphosphine ligand - from cyanuric chloride and diphenylphosphine is reported. This unusual reaction represents the first example of tandem C-C/C-P coupling between (het)aryl halides and P-H species, yielding a structurally unique bi(hetaryl)-tetraphosphine. Theoretical study indicates that the 2,2'-bi(s-triazine) core arises from hydrolysis of an intermediate [Ph2P(TrCl2)2]+ salt, formed through quaternization of monophosphine Tr(PPh2)Cl2 with cyanuric chloride. The structure and photoluminescent properties of Tr2P4 were studied. Its coordination chemistry was further demonstrated through the synthesis of tetranuclear Au(I) and Pd(II) complexes, along with the corresponding tetraphosphineselenide. The Au(I) complex exhibited distinct orange-to-green thermochromic luminescence upon cooling-warming in the 77-298 K range.
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