知识与财富的链接
对氢化硅烷化反应所用铂催化剂已进行了大量的研究,但以氯铂酸(钠)的冠醚络合物作为氢化硅烷化反应的催化剂至今未见报导.冠醚用于铂系金属的络合多是以含氯,含硫的环状化合物为配体.氯铂酸(钠)冠醚络合物的研究旨在寻求室温惰性、高温有良好活性和能反复使用的新型氢化硅烷化反应催化剂.
Four novel complexcs were obtained by reaoting H2PtCl6·6H2O or Na2PtCl6 with 18 Crown-6 and 1, 7, 10, 16-tetraoxa-4, 13-diazacyclooctadecane in molar ratio of 1:2 and 1:1 respectively. The complexes arc stable and slightsoluble or unsoluble in common organic solvents. In hydrosilylation of unsaturated compounds the complexes show a high catalytic activity at 80℃ and can be recovered and reused for several times. The activity of the complexes are, however, lower than that of H2PtCl6 or Na2PtCl6 alone when the hydrosilylation is carried out at 40℃ or room temperature.
