38689-22-4

Basic information

• Product Name: 1,2,4,5-Benzenetetrol, 3,6-dichloro-
• CAS NO: 38689-22-4
• Molecular Formula: C6H4Cl2O4
• Molecular Weight: 211.001
• Mol File: 38689-22-4.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 1,2,4,5-Benzenetetrol, 3,6-dichloro-(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,4,5-Benzenetetrol, 3,6-dichloro-(38689-22-4)
• EPA Substance Registry System: 1,2,4,5-Benzenetetrol, 3,6-dichloro-(38689-22-4)

Safety Data

• Hazardous Substances Data: 38689-22-4(Hazardous Substances Data)

Upstream product

• 87-88-7 3,6-dichloro-2,5-dihydroxy-1,4-benzoquinone 
• 7664-93-9 sulfuric acid 
• 7647-01-0 hydrogenchloride 

Downstream Products

• 135646-90-1 1,2,4,5-tetraacetoxy-3,6-dichloro-benzene 

Relevant articles and documents

Hypovalent titanium and Ti(II)-Ti(III) interconversions

Treatment of pink titanium(iii) triflate (0.045 M) with HF in triflic acid (CH3SO3H) converts Ti(iii) rapidly to a 1:1 mixture of TiIV and green TiII: (2 TiIII + 4 HF → TiF4 + TiII + 4 H+). This disproportionation is half complete when [HF] added is 0.027 M. Substituted 1,4-benzoquinones are reduced rapidly by Ti(iii) in the absence of fluoride, yielding straightforward logarithmic curves, but reactions of the same quinones with Ti(ii) in fluoride media exhibit more complex profiles, the major portions of which are zero order in oxidant. These reactions are strongly catalyzed by added Ti(iv). Analyses of complex curves are consistent with a reaction sequence initiated by Ti(ii)-Ti(iv) disproportionation, forming Ti(iii), which reacts with the quinone, yielding the quinhydrone, QH. The latter is rapidly reduced by Ti(ii). Values of rate constants obtained from these analyses are in agreement with those for reductions of quinones by Ti(iii), in the absence of fluoride. The Royal Society of Chemistry 2010.

Reactions of 1,4-benzoquinones with s2 reducing centers

Aqueous solutions of Sn(II) and Ge(II) (in chloride media) and In(I) (in perchlorate media) react quantitatively with 1,4-benzoquinone and its 2,5-(OH)2 and 2,5-Cl2-3,6-(OH)2 derivatives, reducing the oxo-functions to 1,4-(OH)2. For Sn(II) and Ge(II), reaction is accelerated by incorporation of 2,5-(OH)2 substituents and by chloroanation of the s2 center. The most reactive reducing Sn(II) species are SnCl3- for benzoquinone and dihydroxyquinone but SnCl2(aq)x for the dichloroquinone. Reductions by Ge(II) proceed mainly through a species (probably GeCl 42-) having one more chloride than the predominant form. The activated complex for the (OH)2bzq-Ge(II) reaction features two germanium centers, only one of which is involved in the reduction act. Reductions of these quinones by In(I) proceed 102-103 times as rapidly as those by Sn(II) and Ge(II) and are not accelerated by hydroxylation of the quinone ring. The Royal Society of Chemistry 2003.