Your browser doesn't support javascript.
loading
Molecular engineering. 8. Kinetic and conformational studies of resorcin [4]arene-based C4 tetraoxatetrathiahemicarceplexes: carceroisomerism and twistomerism.
Paek, K; Ihm, H; Yun, S; Lee, H C; No, K T.
Affiliation
  • Paek K; Molecular Engineering Research Laboratory and Department of Chemistry, Soongsil University, Seoul 156-743, Korea. kpaek@saint.ssu.ac.kr
J Org Chem ; 66(17): 5736-43, 2001 Aug 24.
Article in En | MEDLINE | ID: mdl-11511247
New C(4v) tetraoxatetrathiahemicarcerands and their six hemicarceplexes containing DMF, DMA, DMSO, or NMP were synthesized and characterized. Their conformations, kinetic properties, carceroisomerism, and twistomerism were studied by VT, 2D COSY, NOESY, and ROESY (1)H NMR experiments. The decomplexation rates of DMF or DMA were very slow with high activation energy barriers (73 and 104 kJ mol(-1), respectively) and the complexed guests feel more constriction than their free liquid state. The largest isomerization energy barrier of carceroisomers was 15.4 kcal mol(-1), and the isomerization energy barriers of twistomers are significantly larger than those of carceroisomers.
Search on Google
Collection: 01-internacional Database: MEDLINE Language: En Journal: J Org Chem Year: 2001 Document type: Article Country of publication:
Search on Google
Collection: 01-internacional Database: MEDLINE Language: En Journal: J Org Chem Year: 2001 Document type: Article Country of publication: