These compounds are ordered in the spectrochemical series based on the size of their (*) crystal field splitting parameter.
One of these compounds undergoes an eta-5 to eta-3 transition in the indenyl effect. The presence of one of these compounds causes a change in interelectron repulsion as measured by the Racah parameter in the nephelauxetic effect. The size of these compounds can be measured using bite or cone angles. These compounds are ordered in the spectrochemical series based on the size of their (*) crystal field splitting parameter. Cyclopentadiene acts as one of these compounds with a hapticity of 5 in ferrocene. Polydentate examples of these compounds act as chelating agents. Tetrahedral complexes possess 4 of these compounds. For 10 points, name these compounds which bond to a central metal atom in a coordination complex.
One of these compounds undergoes an eta-5 to eta-3 transition in the indenyl effect.
ligands [before the words "Racah parameter," accept metallocenes or coordination complexes or coordination compounds, do not accept or prompt on them afterwards]