hi all,
I am having a zeolite which is saturated with hydroxyl groups at one end. In the vaccum space above it i have a organic molecule which also holds a hydroxyl group in it. Now i wish to select only those hydroxyl hydrogen atoms of the organic molecule. But if i try to select it using the atom select dialog box by means of Forcefield type, the hydroxyl group of the zeolite is also getting selected. could someone help me in what way i can choose only those organic molecule leaving behind the saturated hydroxyl group of zeolite.

Thanks in advance
Naresh