ABSTRACT As shown by 31P NMR experiments, addition of β-cyclodextrin or randomly methylated β-cyclodextrin to an aqueous solution of HRh(CO)(P(m-C6H4SO3Na)3)3 has no effect on the organometallic complex. In contrast, HRh(CO)((p-(CH3)3CC6H4)P(m-C6H4SO3Na)2)3, in the presence of the same cyclodextrin derivatives can be partially converted to the hydroxo complex HORh(CO)((p-(CH3)3CC6H4)P(m-C6H4SO3Na)2)2. This remarkable difference of behavior was attributed to the fact that the phosphine (p-(CH3)3CC6H4)P(m-C6H4SO3Na)2, forms with the β-cyclodextrin derivatives more stable inclusion complexes than the phosphine P(m-C6H4SO3Na)3. |
