parameter in CDCl3
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1H NMR 300 MHz C12 H8 ca 10-20 wt% in CDCl3 biphenylene 
Parameter ppm Hz
D(A) 6.664 D(B) 6.556 J(A,A') 1.00 J(A,B) 6.89 J(A,B') 0.82 J(A',B) 0.82 J(A',B') 6.89 J(B,B') 8.23 COOPER,M.A. & MANATT,S.L. J.AM.CHEM.SOC. 92, 1605 (1970)
Hz ppm Int.2009.59 6.699 26 2007.76 6.693 41 2003.46 6.678 662 2000.57 6.669 701 1998.72 6.662 602 1995.69 6.652 1000 1991.22 6.637 102 1989.72 6.632 79 1976.29 6.588 79 1974.78 6.583 102 1970.31 6.568 1000 1967.29 6.558 602 1965.43 6.551 702 1962.54 6.542 662 1958.24 6.527 41 1956.41 6.521 26
CATION RADICAL, OXIDATION WITH CONC. H2SO4
ANION RADICAL, REDUCTION WITH K IN DME
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