2-Methylanthracene solubility

The low solubility of fullerene (Ceo) in common organic solvents such as THE, MeCN and DCM interferes with its functionalization, which is a key step for its synthetic applications. Solid state photochemistry is a powerful strategy for overcoming this difficulty. Thus a 1 1 mixture of Cgo and 9-methylanthra-cene (Equation 4.10, R = Me) exposed to a high-pressure mercury lamp gives the adduct 72 (R = Me) with 68% conversion [51]. No 9-methylanthracene dimers were detected. Anthracene does not react with Ceo under these conditions this has been correlated to its ionization potential which is lower than that of the 9-methyl derivative. This suggests that the Diels-Alder reaction proceeds via photo-induced electron transfer from 9-methylanthracene to the triplet excited state of Ceo-... 

Reported aqueous solubilities of 9-methylanthracene at various temperature and the empirical temperature dependence equations... 

FIGURE 4.1.1.27.1 Logarithm of mole fraction solubility (In x) versus reciprocal temperature for 9-methylanthracene. 

Measured 2-methylanthracene concentration is 21.8 — 0.4 / g/kg. Concentration calculated from a least-squares fit of solubility and temperature obtained using a generator column packed with 99% pure 2-methylanthracene is 21.9 0.2 jxg/kg. 

Figure B-6. Temperature dependence of the aqueous solubility of 2-methylanthracene...

Chrysophanic acid crystallizes in golden, orange-yellow, interlaced needles. It is almost tasteless and odorless fuses at 162° (291°. P.) almost insoluble in cold water, sparingly soluble in hot water, alcohol, and ether, readily soluble in benzene. It forms a red solution with HaSO, from which it is deposited unchanged by water. It also forms red solutions with alkalies. Reducing agents convert it into methylanthracene. 

Southworth etaL (1978) reported that elimination rates in the cladoceran Daphnia pulex increased in the order perylene>benz[a]anthracene= methylanthracene > pyrene > phenanthrene > anthracene > naphthalene. Hence, naphthalene often occurs in relatively low concentrations in natural invertebrate populations. Anderson etal. (1976) demonstrated that methyl-derivatives of naphthalene were retained in invertebrates longer than the parent compound owing to a decrease in solubility and rate of volatilization. Varanasi and Malins (1977) reported bioconcentration factors of 2, 8, 17, and 27 for clams Rangia cuneata exposed to naphthalene, methyl-naphthalene, dimethylnaphthalene, and trimethylnaphthalene, respectively. 

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