We continue to study the characterizations of paracompact locally compact spaces under certain quotient mappings, and discuss
the relationships among them, which expand the results on certain quotient images of paracompact locally compact spaces.
A cellulose xanthate supported palladium(0) complex was synthesized using a simple method and characterized by XPS, TG/DTA
etc. The complex has good thermal stability from room temperature to 250 °C and it was found to be an efficient catalyst for
the Heck reaction of acrylic acid or styrene with aryl iodide at low temperature under atmospheric pressure, and the substituted
trans-cinnamic acid or 1, 2-stilbene was obtained with high yield at 90 °C. The reaction duration is about 8 h. The cellulose xanthate
supported palladium(0) complex could be separated from the reaction mixture easily and reused for several cycles. The yield
of the product was up to 55.3% when the catalyst was run for 10 times. The active center in the complex is Pd metal.