| Abstract: | Abstract Reaction of bihenyl-4,4′-tetrazonium ion with 2,4-pentanedione leads to 3,3′-(4,4′-biphenyldihydrazoni)bis-(2,4-pentanedione).The compound exists in the intramolecularly hydrogen bonded dihydrazone state. Copper(II), nickel(II) and palladium(II) complexes having the composition M2L2 have been synthesised and characterised. Ir, 1H and 13C nmr and mass spectroscopic data clearly indicate the binucleating nature of the chelates in which the hydrogen bonded carbonyls and one of the hydrazono nitrogens of each pentanedione group are involved in bonding with the metal ion. |
