For a framework anchored with metal carbene complexes,will the carbene complexes of (eg. Fe2+, Ni2+, Co2+,Cu+) decompose if I use dilute acid,like HNO3, HBr, to wash it. The carbene part is similar to the core of imidazolylidenes. Heplful experiences/suggestions are highly appreciated.
It depends a bit on the sort (but mainly on the valency) of the carbene complexes you have and the acid you use. For example, HCl or HBr can readily add to low valent carbene complexes of Ni0, Pd0, Pt0, CoI, RhI etc. making +2 more valent complexes. If this happens, you can easily get (back) the imidazolium salt in an elimination-addition equilibrium reaction. Imidazolium salt formation (from the carbene complex) can also occur using the zerovalent Ni group complexes and HNO3 type of acids. It is also known, although its not your question that imidazolium salts can also readily form from imidazolydene types of carbene complexes with PdII and RhI under H2 atmosphere.
It depends a bit on the sort (but mainly on the valency) of the carbene complexes you have and the acid you use. For example, HCl or HBr can readily add to low valent carbene complexes of Ni0, Pd0, Pt0, CoI, RhI etc. making +2 more valent complexes. If this happens, you can easily get (back) the imidazolium salt in an elimination-addition equilibrium reaction. Imidazolium salt formation (from the carbene complex) can also occur using the zerovalent Ni group complexes and HNO3 type of acids. It is also known, although its not your question that imidazolium salts can also readily form from imidazolydene types of carbene complexes with PdII and RhI under H2 atmosphere.
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