A new compound based on polyoxovanadate [{Ni(en)2}2Sb8V14O42]·5.5H2O(en=ethylenediamine)(1) was synthesised hydrothermally as black rhombus crystals.Compou
A facile and efficient 1, 4-conjungate addition(Michael addition) reaction of active methylene compounds to α,β-unsaturated compounds, catalyzed by guanidiniu