Nitrogen nuclear magnetic resonance spectroscopy. Part 7. Extension of the nuclear magnetic resonance–ultraviolet correlation in nitroso-compounds to cover two-co-ordinate nitrogen in the other groupings with oxygen and carbon, and comparison with three-co-ordinate nitrogen in planar groupings (azoxy, etc.)
作者:Joan Mason、William van Bronswijk、Jeremy G. Vinter
DOI:10.1039/p29770000469
日期:——
aryl, N, O, halogen, sulphur) is now extended to cover two co-ordinate nitrogen in N–N–NO2, CN–O, –NN–O. –NN–F, CN–N–C, CN–O, O–NN–O, and C–NN–C groupings. For the related planar groups with three-co-ordinate nitrogen the δ-λ correlation is less good but still evident, even though the long wavelength transitions are not magnetically active; perhaps their energies vary in parallel with those of the relevant
该δ-λ的相关性[所述的14 Ñ化学位移δ以的倒数的能量(Ñ →交通π*)长波长电子吸收]先前已经证明对于亚硝基化合物(等等。)X-N O(其中X是烷基,芳基,N,O,卤素,硫)现已扩展为覆盖N–N–NO 2,C N–O,–N N–O中的两个配位氮。–N N–F,C N–N–C,C N–O,O–N N–O和C–NN–C分组。对于具有三坐标氮的相关平面基团,即使长波长跃迁不具有磁性,δ-λ相关性也较差,但仍很明显。也许它们的能量与相关激发的能量平行变化(例如σ → π*)。连接至不饱和氮的烷基或芳基的全氟化作用使共振场向高处移动了大约。20 ppm(或者在非常低的电场下更高)。