86158-75-0Relevant academic research and scientific papers
Visible absorption spectral studies of molybdenum(V) tetraphenylporphyrins in organic solvents
Imamura, Taira,Tanaka, Tetsuya,Fujimoto, Masatoshi
, p. 1038 - 1041 (2008/10/08)
Visible absorption spectra of molybdenum(V) tetraphenylporphyrin complexes, MovO(TPP)X (X = F, Cl, Br, NCS; TPP = meso-tetraphenylporphinato), in organic solvents and the substitution reactions of these complexes with dimethyl sulfoxide (Me2SO) are discussed. The measurements of molecular weight revealed that these complexes exist as monomers in dichloromethane. Organic solvents used are classified as noncoordinating and coordinating solvents for these complexes. The shift of the main absorption bands, Soret, α, and β bands, of MovO(TPP)X in the noncoordinating solvents correlates with the function of refractive index, (n2 - 1)/(2n2 + 1). The axial ligand X of these complexes is substituted by Me2SO to form [MovO(TPP)·Me2SO]s+X-in Me2SO-CH2Cl2 via the solvated complex [MovO(TPP)X]s as an intermediate. The values of the formation constants of [MovO(TPP)·Me2SO]s+X - are in the order X = F ? NCS ≈ Cl ? Br.
