The exchange between different equilibrium and out-of-equilibrium platinum coordination modes can be orthogonally controlled thermodynamically with a proton input and kinetically using light.

Metastable [M H]+ ions of a,o-diphenylalkanes C,H,(CH,),C,H, where x = 3-6 (structures 3-6 respectively), generated by hydride abstraction in the chemical ionization (i-butane) source, eliminate benzene after proton exchange between the aromatic rings. The proton exchange is slow for ions [3 H]+ and [4 HI+, but fast and apparently complete for ions [S H]+ and [6 H]+ These observations, combined...

Site-specific mutants of human myoglobin have been prepared in which lysine 45 is replaced by arginine (K45R) and aspartate 60 by glutamate (D60E), in order to examine the influence of these residues and their interaction on the dynamics of the protein. These proteins were studied by a variety of methods, including one and two-dimensional proton nuclear magnetic resonance spectroscopy, exchange...