Citation: Xiang Yu SUN, Yao Xing ZHAO, Xiao Tian LIANG. SOLVENT EFFECT ON CONFORMATIONS OF α,ω-BIS (4-NITROPHENOXY)-ALKANES[J]. Chinese Chemical Letters, ;1991, 2(2): 157-160. shu

SOLVENT EFFECT ON CONFORMATIONS OF α,ω-BIS (4-NITROPHENOXY)-ALKANES

a Graduate School, University of Science and Technology of China, Beijing 100039;
b Institute of Materia Medica. Chinese Academy of Medical Sciences, Beijing 100050

Received Date: 1 August 1990

Solvent effect on the conformations of α, ω-bis (4-nitrophenoxy)-alkanes with different chain Lengths (Nn) was studied by UV spectra. In poor solvents such as EG-H₂O and THF-H₂O, with the water content higher than 50%, the K-bands of N₄, N₅, N₆and N₁₀ in the UV absorption spectra shifted to longer wavelengths as compared with 4-nitrophenoxyethane (N₀). It is suggested that in poor solvents the two aromatic groups are close to each other in parallel, forming ground state complexes. The K-band of N₄ showed a blue shift from that of N₀ when the water content was around 5%, probably attributable to a conformation with the nitro group of one benzene ring siting on the plane of the other benzene ring.
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