Carbitol derivatives

Place 0 -5 g. of 3 4 5 triiodobenzoyl chloride in a small test-tube, add 0 -25 ml. of the alcohol - ether and heat the mixture gently over a micro burner until the evolution of hydrogen chloride ceases (3-5 minutes). Pour the molten mass into 10 ml. of 20 per cent, alcohol to which crushed ice has been added. Some derivatives solidify instantly those which separate as oils change to solids in a few minutes without further manipulation. Recrystallise from rectified spirit (use 50 per cent, alcohol for esters of methyl and butyl carbitol ). 

Monoethylene glycol derivatives ate termed "ceUosolves" diethylene glycol derivatives, "carbitols" and triethylene glycol derivatives, triglycols. CELLOSOLVE and CARBITOL ate registered trademarks of EFnion Carbide Corp. 

Carbitol . A trademark of the Union Carbide Corp for mono- and dialkyl ethers of diethylene glycol Si their derivs Refs l)Hackh s(1944), 166 2)Sax(1957), 435 3)CondChemDict(196l), 216... 

The derivatives enumerated above are unsatisfactory for hydroxy ethers, e.g. the mono-ethers of ethyleneglycol ( cellosolves ) and the mono-ethers of diethyleneglycol ( carbitols ) (see Table 10.4). Crystalline derivatives of hydroxy ethers are readily obtained with 3,4,5-triiodobenzoyl chloride, for example ... 

Carbitol [Dow], TM for a group of mono-and dialkyl ethers of diethylene glycol and their derivatives, specialized solvents with a wide variety of properties and uses. Specific types are as follows butyl Carbitol . 

If RXM is an alcohol ROH, the product is an ethoxylated derivative of the alcohol, R0(CH2CH20),H. a simple example of this type of derivative, when RXM is CH3OH and X = 2, is CH3OCH2CH2OCH2CH2OH, Methyl Carbitol . 

---