947595-96-2Relevant academic research and scientific papers
Synthesis, structure, and LLCT transitions in terminal hydrazido(2-) bipyridine complexes of titanium
Patel, Sameer,Li, Yahong,Odom, Aaron L.
, p. 6373 - 6381 (2008/10/09)
Addition of 2,2′-bipyridine and its derivatives to Ti(NMe 2)2(dpma), where dpma is N,N-di(pyrrolyl-α-methyl)- N-methylamine, followed by various hydrazine derivatives was used to generate a series of terminal hydrazido(2-) complexes. Among the new complexes is Ti[=NN(H)Ph](But-bpy)(dpma), which was structurally characterized, where But-bpy is 4,4′-tert-butyl-2,2′-bipyridine. Other new complexes reported are Ti(NNMe2)(Me-bpy)(dpma), Ti-(NNMe 2)(bpy)(dpma), Ti(NNMe2)(Ph-bpy)(dpma), Ti[NN(Me)Ph](But-bpy)(dpma), Ti[NN(Me)p-tolyl](But-bpy) (dpma), and Ti[NN(Me)4-FC6H4](But-bpy)(dpma). Titanium hydrazido(2-) complexes bearing bpy substituents possess a low-energy transition, leading them to have blue or green colors, which is somewhat unusual for titanium(IV) species. Through absorption studies on the derivatives, it was determined that the low-energy transition is the result of an unusual ligand-to-ligand charge transfer where electron density residing on the hydrazido(2-) is transferred to the bpy μ* orbitals.
