Benzene, tris

A solution of sodium methoxide (80 mmol) in methanol (40 mL) is added to silica gel (2.7 g, 45 mmol) followed by a solution of catechol (13.2 g, 120 mmol) in methanol (40 mL). The resulting mixture is stirred and heated under reflux for 18 h. The methanol is then evaporated and the solid residue washed with ether. The black sohd is dissolved in THF (400 mL) and the resulting solution is heated for 1 h in the presence of charcoal. After filtration and evaporation of the solvent the sodium tris(benzene-l,2-diolato)silicate 80 is isolated as a white powder (12.53 g, 70% Scheme 2.20) [93]. 

Let s try benzene, C6H6. Benzene is neither tetrahedral nor octahedral. 

C. Reactivity of Tris(benzene-l,2-diolato) Complexes of Silicon. 1271... 

In contrast to the well-established chemistry of the tris [benzene-1,2-diolato(2-)]silicate dianion (including derivatives with substituted ligands), the chemistry of the related tris[ethane-l,2-diolato(2-)]silicate dianion is significantly less well explored. To the best of our knowledge,... 

Figure 13 The structure of the tris(benzene-lf2-diolato)arsenate(y) anion, showing the absolute configuration (Reproduced by permission from Acta Cryst., 1972, B28, 3446)...

Cowie M, Bennett MJ (1976) Trigonal-prismatic vs. octahedral coordination in a series of tris (benzene-l,2-dithiolato) complexes. 1. Crystal and molecular structure of tris(benzene-l,2-dithiolato)molybdenum(VI), Mo(S2CsH4)3. Inorg Chem 15 1584-1589. doi I0.I02I/... 

The extremely unstable mono-77-cyclopentadienyltitanium tri(benzene-thiolate) has also been reported, ... 

An unusual oxidation of phosphines involving water as the oxygen source and tris(benzene-l,2-dithiolate)molybdenum(vi) as the oxidant was also described. 

C74H79B10N2P3RUS, Dihydrido(dimethylsulfidodia2odecaborane)tris(tri-phenylphosphine)ruthenium tris(benzene), 43B, 1344 C7 6H60MO2N8, Tetrakis(N,N diphenylbenzamidinato)dimolybdenum(II), 41B, 1101... 

C1BH12M0S6, Tris(benzene-1,2-dithiolato)molybdenum(VI), 42B, 942 ClbHi2N2PdS2, Bis(8"mercaptoquinolinato)palladium, 39B, 824 ClbHi2N2PtS2 f Bis(8-mercaptoquinolinato)platinum, 39B, 824 ClbHj 3O9OS3PS2 f (M"Hydrido)-(M"dithioformato)-bis(tricarbonyl-osmium)-tricarbonyl(dimethylphenylphosphine)osmium, 46B, 1212 ClbHi5Cl2HgPSe, Triphenylphosphine selenide mercury(II) chloride, 40B, 1128... 

C26H3sN2S6Zr, Bis(tetramethylammonium) tris(benzene-1,2-dithiolato)-zirconate(IV), 42B, 947... 

The objective of chemical safety testing is to prevent the introduction into the environment of chemicals that represent a significant health hazard to humans or to the immediate environment on which maintenance of the human species depends. For chemicals that must remain in the environment for one reason or another, safety testing can be used to establish a safe or tolerable exposure level. The potential benefit of test results from evaluations for genotoxicity applied to human health considerations can be substantiated by the early indications of genotoxic activity for vinyl chloride, tris-(2,3-dibromo-propyl) phosphate (TRIS), benzene, hycanthone, and the Japanese food additive 2-(2-furyl)-3-(5-nitrofuryl)acrylamide(AF-2). In some of these cases, mutagenic data were available before the chemicals were identified as animal carcinogens. 

BBC = 4,4, 4"-(benzene-l,3,5-triyl-tris (benzene-4,1-diyl)) tribenzoate BTB = 4,4, 4"-Benzene-1,3,5-triyltribenzoate CSD = Cambridge Structmal Database ... 

---