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Updated: Mar 13, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Dihalogen-substituted [MnIII(3,5-diHal-sal2323)]BPh4 salts: so similar but so different
D V Korchagin1, G V Shilov1, M V Zhidkov1
1Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, FRC PCP MC RAS, 1 ac. Semenov av., Chernogolovka, 142432, Russian Federation. korden@icp.ac.ru.
Abstract:
Three novel tetraphenylborate salts of Mn(III) complexes with the Schiff base ligands 3,5-diHal-sal2323 are synthesized and structurally and magnetically characterized: [Mn(3,5-Br,F-sal2323)]BPh4 (1), [Mn(3,5-diI-sal2323)]BPh4 (2) and [Mn(3,5-Cl,Br-sal2323)]BPh4 (3). Complex 1 exhibits gradual and incomplete spin transition with T1/2 = 169 K between high spin (S = 2) and low spin (S = 1) states. The complex 2 shows no spin-crossover and retains the high spin (HS) ground state throughout the studied temperature range (2-300 K). Finally, complex 3 demonstrates two structural phase transitions (Cc → Pc and Pc → P1), with the latter one being related to a spin crossover from the HS : HS to the intermediate HS : LS phase at 133 K. The established magneto-structural correlations are traced in comparison with previously reported dihalogen-substituted [Mn(3,5-diHal-sal2323)] complexes with a tetraphenylborate anion.
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