characterization of novel air-tolerant symmetrical 2,4-bis(2,4,6-tri-t-butylphenyl)-1,3-diphosphacyclobutane-2,4-diyls bearing the identical alkyl substituents on the phosphorus atoms. Structures and properties of the 1,3-diphosphacyclobutane-2,4-diyls indicate characters as singlet ground-state carbon centered biradicals. In addition to those biradicals, we succeeded in preparation and isolation of a novel
甲动力学稳定phosphaalkyne带有笨重的Mes * (2,4,6-三-吨丁基苯基)基团是通过与
锂的反应,以制备高度稳定的1,3- diphosphacyclobutane -2,4- diyls数量庞大的有用的化合物试剂和亲电试剂。通过利用该合成方案,我们制备了几个不对称的1,3-二
磷环丁烷-2,4-二基,其中
磷上的取代基不同。此外,我们成功地制备和新颖空气耐受对称2,4-双表征(2,4,6-三-吨(-丁基苯基)-1,3-二
磷环丁烷-2,4-二基在
磷原子上带有相同的烷基取代基。1,3-二
磷环丁烷-2,4-二基的结构和性质表明其为单重态基态碳中心双自由基。除了这些双自由基,我们还成功地制备和分离了新型P杂环空气稳定的中性自由基以及P杂环阳离子自由基。