EXAFS local structure studies of organometallic and cluster species

EXAFS structural parameters, viz. interatomic distances Ri and coordination numbers Ni in novel organometallic and cluster species, and the influence of a static and dynamic disorder on these parameters, are discussed. First M–M spheres in polynuclear 5d-metal derivatives and outer metal–metal spheres in distorted large clusters may not be seen in room-temperature studies. This effect often restricts geometric information available on colloid and supported polynuclear species to the closest coordination environment and may cause an elimination of the oxide shell in metal nanoparticles during data reduction.