chem-art

I have problem with getting normal coordinates offset. I have cube1 and cube2. cube1 position is 10,10,10 and cube2 position is 10,9,10. Cube 2 offset refers to local coordinate system of cube1. If rotation of cube1 is 0,0,0 i get position offset 0,-1,0. But if cube1 rotation is 45,0,0 i get offset 0,-0.7071,+0.7071. The problem is that offsets dont use normal coordinate system, they use local coordiante system of cube1. How do i get offsets on normal coordinate system?

I'm looking for a site that has all chemical reactions categorized by functional group. I found this two sites: http://www.chem.uic.edu/web1/OCOL-II/WIN/RXN.HTM http://www.cem.msu.edu/~reusch/VirtualText/functbl.htm ... but I think the list is incomplete. correct me if I'm wrong.

Can you use normal lenses outside the visible spectrum? What wavelengths can they be used with?

Like i understand hard discs work with magnetic fields. How can you recover data if something was writen over it. Magnetic field changes... how are you supossed to see how it was magnetised before that? My logic is telling me that it is impossible. Anyone knows if it's true or not?

sodium boro hydride isn't enough reactive except if i would change OH group of carboxylic group to H.

Anyone knows method of reducing carboxylic acid to alcohol that doesn't include LiAlH4?