The synthesis, isolation, and characterization of a series of co-crystals and adducts of 1,2,3,4-cyclobutane tetracarboxylic acid (H4CBTC) with the dinitrogen bases 1,2-bis(4-pyridyl)ethane (BPA) and 1,2-bis(4-pyridyl)ethylene (BPE), respectively, are reported. The thermal stability and interconversion process between the dihydrated salt [BPAH(2)][H2CBTC]center dot 2H(2)O and its dehydration product and the use of this latter to obtain the neutral co-crystal [BPA](2 center dot)[H4CBTC] have been investigated. The products obtained with 1,2-bis(4-pyridyl)ethylene (BPE), namely, the salt [BPEH][H3CBTC] and the co-crystal [BPE](2)center dot[H4CBTC] are prearranged in space so as to be able to react photochemically yielding rctt-tetrakis(4-pyridyl)cyclobutane (TPCB). Recrystallization from ethanol of the photocyclization products yields the channeled structure of the solvated co-crystal [TPCB]center dot[H4CBTC]center dot EtOH.

D. Braga, S. D'Agostino, F. Grepioni (2012). Co-Crystals and Salts Obtained from Dinitrogen Bases and 1,2,3,4-Cyclobutane Tetracarboxylic Acid and the Use of the Latter As a Template for Solid-State Photocyclization Reactions. CRYSTAL GROWTH & DESIGN, 12, 4880-4889 [10.1021/cg300716q].

Co-Crystals and Salts Obtained from Dinitrogen Bases and 1,2,3,4-Cyclobutane Tetracarboxylic Acid and the Use of the Latter As a Template for Solid-State Photocyclization Reactions

BRAGA, DARIO;D'AGOSTINO, SIMONE;GREPIONI, FABRIZIA
2012

Abstract

The synthesis, isolation, and characterization of a series of co-crystals and adducts of 1,2,3,4-cyclobutane tetracarboxylic acid (H4CBTC) with the dinitrogen bases 1,2-bis(4-pyridyl)ethane (BPA) and 1,2-bis(4-pyridyl)ethylene (BPE), respectively, are reported. The thermal stability and interconversion process between the dihydrated salt [BPAH(2)][H2CBTC]center dot 2H(2)O and its dehydration product and the use of this latter to obtain the neutral co-crystal [BPA](2 center dot)[H4CBTC] have been investigated. The products obtained with 1,2-bis(4-pyridyl)ethylene (BPE), namely, the salt [BPEH][H3CBTC] and the co-crystal [BPE](2)center dot[H4CBTC] are prearranged in space so as to be able to react photochemically yielding rctt-tetrakis(4-pyridyl)cyclobutane (TPCB). Recrystallization from ethanol of the photocyclization products yields the channeled structure of the solvated co-crystal [TPCB]center dot[H4CBTC]center dot EtOH.
2012
D. Braga, S. D'Agostino, F. Grepioni (2012). Co-Crystals and Salts Obtained from Dinitrogen Bases and 1,2,3,4-Cyclobutane Tetracarboxylic Acid and the Use of the Latter As a Template for Solid-State Photocyclization Reactions. CRYSTAL GROWTH & DESIGN, 12, 4880-4889 [10.1021/cg300716q].
D. Braga; S. D'Agostino; F. Grepioni
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/132831
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