Thomas, Bejoy;Prathapan, S.;Sugunan, S. published 《Effect of pore size on the catalytic activities of K-10 clay and H-zeolites for the acetalization of ketones with methanol》. The research results were published in《Applied Catalysis, A: General》 in 2004.Quality Control of Dimethoxydiphenylmethane The article conveys some information:
One-pot acetalizations of cyclohexanone, acetophenone and benzophenone were carried out using methanol over H-montmorillonite clay (a mesoporous material), silica, alumina, and different zeolites such as HFAU-Y, HBeta, H-ZSM-5, and H-mordenite. In all the cases, a single product-the corresponding dimethylacetal-was obtained in high yields. Hemiacetal formation was not observed with any catalyst. A comparison of catalytic activity indicated that montmorillonite K-10 is the most active catalyst for the reaction. As evidenced by the reaction time studies, the catalyst decay is greater over the zeolite catalyst than over the clay. And Dimethoxydiphenylmethane (cas: 2235-01-0) was used in the research process.
Dimethoxydiphenylmethane is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. Quality Control of Dimethoxydiphenylmethane The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.
Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem