Organotin(IV) derivatives of novel β-diketones: Part V. Synthesis and characterization of di- and triorganotin(IV) derivatives of 4-acyl-5-pyrazolones modified in position 3 of the pyrazole. Crystal structure of (1,3-diphenyl-4-benzoyl-pyrazolon-5-ato)triphenyltin(IV)

摘要: Abstract The interaction between R 3 SnCl, (R Sn) 2 O, SnO or SnCl acceptors (R=Me, n Bu Ph) and the two novel β-diketone proligands (LH=1,3-diphenyl-4-R 4 (CO)-pyrazol-5-one: L 1 H, =Ph; =Me) yields complexes [SnR (L)(H O)] (R=Me Bu, L=L ), [SnPh (L)] (L) ] (L=L ). phenyl substituent on position induces instability of triorganotin derivatives in solution with formation SnR compounds. Moreover, diorganotin partially dissociate yielding (L)(solvent)] 2+ species. When compared related 3-methyl species, crystal structure (1,3-diphenyl-4-benzoyl-pyrazolon-5-ato)triphenyltin(IV) is not modified by 3-phenyl substitution. chemical generated Ph greater than positions 4. In addition, pyrazole influences behavior free neutral 4-acyl-5-pyrazolones stabilizing a amino-diketo tautomeric form.