作者:Zaira J Domı́nguez、Ma Teresa Cortez、Barbara Gordillo
DOI:10.1016/s0040-4020(01)00997-8
日期:2001.12
2λ5-dioxaphosphinane (eq-cis-2) are informed. In accordance with proton–proton and proton–phosphorus coupling constants, the dioxaphosphinane ring adopts a chair conformation in all compounds except in the case of trans-2, which was found in a twisted conformation. Solid state structural analyses suggest that only the synaxial Me/NR2 or Me/S interactions in trans-2, force the heterocycle ring to remain as a mixture
在溶液中,并在高度拥挤的移动系统中,固态的构象分析2-二环己基氨基-2-硫代- 1,3,2λ 5 -dioxaphosphinane(1),2-二环己基氨基-2-硫代-反式-4,6-二二甲基1,3,2λ 5 -dioxaphosphinane(反式- 2)和它们的anancomeric类似物,斧-2-二环己基氨基-2-硫代-顺式-4,6-二甲基- 1,3,2λ 5 -dioxaphosphinane(斧-顺- 2)和当量-2-二环己基氨基-2-硫代-顺式-4,6-二甲基- 1,3,2λ 5 -dioxaphosphinane(当量-顺- 2)被告知。根据质子-质子和质子-磷偶合常数时,dioxaphosphinane环采用的所有化合物在椅式构象中除外的情况下,反式- 2,这是在扭曲的构象中。固态结构的分析表明,只有synaxial ME / NR 2或Me / S在相互作用反式- 2,迫使