Metal complex-catalyzed redistribution reactions of organosilanes
作者:Wayne A. Gustavson、Paul S. Epstein、M.D. Curtis
DOI:10.1016/s0022-328x(00)86840-0
日期:1982.10
Redistribution reactions of a variety of hydrogen-substituted siloxanes are catalyzed by various transition metalcomplexes of iridium and rhodium. The products arise from breaking and remaking of SiC, SiH, and SiO bonds. Siloxanes not possessing a SiH bond are inert under the conditions studied. The most favored reaction pathway appears to scramble preferentially the groups directly attached to
铱和铑的各种过渡金属络合物催化了各种氢取代的硅氧烷的再分布反应。产物是由SiC,SiH和SiO键的断裂和重制产生的。在所研究的条件下,不具有SiH键的硅氧烷是惰性的。最优选的反应途径似乎优先扰乱直接连接到带有氢原子的硅上的基团。报道了一种新的环-铱二硅氧烷,L 2(CO)(H)Ir(SiMeROSiMeR)(LLPh 3 P; R = Me 3 SiO)。由于环上R和Me基团的空间排列,该化合物以三种异构体形式存在。
Composition for separating mixtures
申请人:Procter Ian
公开号:US20070249502A1
公开(公告)日:2007-10-25
Therefore, there is provided herein in one specific embodiment a composition comprising: a) at least one silicone surfactant, and where silicone of silicone surfactant (a) has the general structure of:
M
a
1
M
b
2
D
c
1
D
d
2
T
e
1
T
f
2
Q
g
;
and,
2≦(
a+b+c+d+e+f+g
)≦100; and,
b) a mixture comprising an aqueous phase, a solid filler phase and optionally an oil phase that is substantially insoluble in said aqueous phase.