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C 6 (CH 3 ) 2 O 4 H 2 , 2,5-dihydroxy-3,6-dimethyl-p-benzoquinone,  M  r  = 168.15, monoclinic,  P 2 1 / a ,  a  = 694.53(9),  b  = 736.99(7),  c  = 743.00(9) pm,  β  = 98.86(1)°,  V  = 375.78 · 10 6  pm 3 ,  Z  = 2,  D x   = 1.49 g/ cm 3 , Cu Kα ,  λ  = 154.18 pm,  μ  = 9.26 cm −1 ,  F (000) = 176,  T  = 293 K,  R  = 3.9%,  R w   =3.8%,  R g   = 3.7% for 473 used unique reflections. The structure was refined by least-squares methods using single crystal X-ray diffractometer data. The centrosymmetric molecules of C 6 (CH 3 ) 2 O 4 H 2  are interlinked by intermolecular hydrogen bonds to chains extending along [010]. Intramolecular hydrogen bonds exist as well.

Crystal structure and hydrogen bonding of 2,5-dihydroxy-3,6-dimethyl-p-benzoquinone