| abstract |
A modified silica support having a polar phase bound to its surface and suitable for use for chromatographic separations, having the following formula: n n nwherein, m=0-20; n=0-20; p=1-50; X is sulfonyl, carbonyl, carbamoyl, or oxycarbonyl; R 1 =H, alkyl, substituted alkyl, aryl or substituted aryl groups; R 2 =alkyl, substituted alkyl, aryl or substituted aryl groups; and R 3 and R 4 are alkyl, aryl, hydroxyl, or alkoxyl groups or groups including oxygen atoms cross-linked to silicon atoms. Also, a polar silane intermediate to make this support. |