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作 者:郭亚军[1] 刘训稳[1] 曾群英 郎万中[1] 褚联峰[1] 杨春基 王斯晗
机构地区:[1]上海师范大学生命与环境科学学院,上海200234 [2]中国石油研究院大庆化工研究中心,大庆163001
出 处:《上海师范大学学报(自然科学版)》2009年第4期331-336,共6页Journal of Shanghai Normal University(Natural Sciences)
基 金:上海市科委国内合作计划科技专项(8165820500)
摘 要:以乙醇为溶剂、RhCl3.3H2O为铑源、三苯基膦(PPh3)为配体及甲醛为羰基源,在常压回流条件下一步法合成目标铑膦配合物HRh(CO)(PPh3)3,考察了不同氢源(H2、NaBH4和KOH)对铑膦配合物结构的影响.利用FT-IR、31P CP MAS NMR和XPS等对不同氢源条件下制备的铑膦配合物产物的结构进行表征.结果显示:以H2为氢源时,铑膦配合物产物主要为trans-RhCl(CO)(PPh3)2;以NaBH4为氢源时,产物为trans-RhCl(CO)(PPh3)2和HRh(CO)(PPh3)3的混合产物,同时甲醛溶液的滴加速度对产物的组成也有着重要影响,通过控制甲醛溶液的滴加速度可以有效抑制产物中trans-RhCl(CO)(PPh3)2的含量;以KOH为氢源时,产物为目标产物HRh(CO)(PPh3)3.HRh (CO) ( PPhs ) 3 was synsthized by one - step method under atmospheric pressure with ethanol as solvent, RhCl3·3H2O as rhodium scoure, triphenylphosphine( PPhz ) as the ligand and formaldehyde solution as carbonyl source. The effects of hydrogen sources, i.e. H2 , NaBH4 and KOH on the chemical structure of Rh - P products were researched. The chemical structures were characterized by FT -IR, XPS and ^31P CP MAS NMR. The results show that the products were trans-RhCl (CO) ( PPh3 ) 2, blends of trans-RhC1 (CO) ( PPh3 ) 2 and HRh (CO) ( PPhs ) s and the desired HRh (CO) ( PPhs ) 3 when using H2, NaBH4 and KOH as hydrogen source, resepectively. Also, the droplet speed of the solution has a significant impact on the composition of trans-RhCl(CO) ( PPh3 ) 2 and HRh(CO) ( PPhs ) 3 when using formaldehyde as hydrogen source.
关 键 词:HRh(CO)(PPh3)3 加氢甲酰化 氢源 铑膦配合物
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