THE SYNTHESİS OF SOME BIS-SUBSTITUTED FORMAZANS AND THE INVESTIGATION OF THE EFFECT OF SUBSTITUENT UPON THEIR UV- VIS. ABSORPTION X.lnax VALUES

Authors : H TEZCAN

Pages : 0-0

Doi:10.1501/Commub_0000000351

View : 25 | Download : 7

Publication Date : 2005-01-01

Article Type : Research Paper

Abstract :In this study l,4-bis-[3,3’-phenyl-5,5’-insert ignore into journalissuearticles values(2-carboxyphenyl);-formaz-l-yl]-benzene-2-sulphonic acid insert ignore into journalissuearticles values(2,CSPF); and its derivatives with OH groups at the o-, m- and p- positions of 3-phenyl ring were synthesized. The structures of the formazans thus obtained were elucidated by elemental analysis, MASS spectroscopy, IR, `H-NMR and UV-Vis spectra. Also UV-Visible K™* values were investigated according to substituent effect. The Xmax values were observed to shift towards shorter wave lengths by 130 nm in CSPF relation to 1,3,5-triphenylformazan insert ignore into journalissuearticles values(TPF); due to the fact that the structure of CSPF contained electron withdrawing -COOH and -SO3H groups insert ignore into journalissuearticles values(hypsochromic effect);. The addition of-OH group to 3-phenyl ring of CSPF, was observed a small bathochromic effect in accordance to the electron donating effect of -OH group.
Keywords : SYNTHESİS, BIS SUBSTITUTED, FORMAZANS

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