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• W2947704890 abstract "Tetraphenylphosphonium carboxylates as solvates of [Ph 4 P] + [OC(O)C 6 H 3 (OH) 2 ‑2,6] − ×PhH ( 1 ) and [Ph 4 P] 2 + [O 2 CCH 2 CH 2 CO 2 ] 2− ×TolH ( 2 ) types were synthesized by the reactions of pentaphenylphosphorus with 2,6-dihydroxybenzoic and succinic acids at the mole ratio of 2:1 and 1:1, respectively. The reactions were accomplished by heating the benzene or toluene solutions of the mixture of compounds inside an evacuated glass ampoule at 60 °С for 0.5 hour. The structure of compounds was characterized by IR spectroscopy and single-crystal X‑ray diffraction study. According to X-ray diffraction data, the crystals of tetraphenylphosphonium carboxylates 1 and 2 consist of the [Ph 4 P] + tetrahedral cations (the СРС angles are 106.4(3)–113.5(3)° ( 1 ), 107.8(2)–111.5(2)° ( 2 ), and the P-C bond lengths are 1.771(6)–1.809(6) Å ( 1 ), 1.791(4)–1.804(4) Å ( 2 )), single charged ( 1 ) or double charged ( 2 ) carboxylate anions and solvate arene molecules. Two types of crystallographically independent cations and anions ( a , b ) exist in crystals 1 . Anions of the compound 2 are centrosymmetric. In the carboxylate anions the C−O bonds are aligned (1.263(9), 1.273(9) Å 1 а , 1.24(1), 1.257(9) Å 1 b , 1.254(6), 1.272(5) Å 2 ), and the OCO angles at the carboxyl carbon atom are close to the theoretical value of 120°. The anions 1 are characterized by the presence of intermolecular short contacts О−Н∙∙∙О−С between oxygen atoms of the carboxyl group and o -hydroxyl groups; the Н∙∙∙О and О∙∙∙О distances are 1.73−2.03 Å and 2.450(8)−2.484(8) Å, respectively. Structural organization in the crystals is caused by weak hydrogen bonds of the С−Н···О type between the carboxylate groups and oxygen atoms of the hydroxyl groups (in crystal 1 ). Short contacts between the carboxylate oxygen atoms and a hydrogen atom of the methyl group of the solvated toluene molecule are observed in complex 2 ." @default.
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• W2947704890 date "2019-01-01" @default.
• W2947704890 modified "2023-09-27" @default.
• W2947704890 title "Reactions of Pentaphenylphosphorus with 2,6-Dihydroxy-benzoic and Succinic Acid" @default.
• W2947704890 doi "https://doi.org/10.14529/chem190108" @default.
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