The crystal structure of 2,3-benzo-1,4,7,13-tetraoxa-10-selenacyclopentadeca-2-ene was de-termined,C_(14)H_(20)O_4Se,M_r:331.27,orthorhombic,Pbca,a=18.445(3),b
In this paper a series of ab initio SCF and configuration calculations were reported forthe ground state and excited states X~2E, A~2E,~2B_2 and ~2A_1 of allen
With a new approach,the general current expressions of two typical second ordercatalytic reactions are obtained for disk,hemispherical and spherical microelect
In previous communications we have reported that arteannuic acid(1,Scheme1)is a common precursor of the biosynthesis of both arteannuin(2)and arteannuinB(3)by