Control of the thermalcis totrans isomerizations of azobenzene and thioindigo derivatives by the formation of supramolecular H-bonded assemblies
作者:Jacqueline Rosengaus、Itamar Willner
DOI:10.1002/poc.610080111
日期:1995.1
(association constants K = 4.9 × 104 and 3.5 × 105 1 mol−1, respectively). The thermal cis→trans isomerization of 4b and 5b to 3,3′-diacetyl-trans-azobenzene (4a), and 6,6′-diethoxy-trans-thioindigo (5a), is inhibited in the intermolecular complex 1a–4b and 1a–5b. Molecular mechanics calculations support the formation of the intermolecular H-bonded complexes between 1a and 4b or 5b.
2,3-双(氨基环己基)-6-甲氧基-1,3,5-三嗪(1a)与3,3'-二乙酰基-顺式-偶氮烯(4)和6,6'-二乙氧基形成分子间H键合的配合物-顺式-硫靛蓝(5b),(缔合常数K分别为4.9×10 4和3.5×10 5 1 mol -1)。4b和5b的热顺→反异构化为3,3'-二乙酰基-反-偶氮苯(4a)和6,6'-二乙氧基-反-硫代靛蓝(5a)在分子间复合物1a–4b和1a-5b。分子力学计算支持在1a和4b或5b之间形成分子间H键合的配合物。