Alpha, beta, gama and delta Carbon / Hydrogen .
1. First carbon / hydrogen from functional group (in this case it is OH) is called ALPHA carbon and hydrogen present on alpha carbon is called ALPHA hydrogen.
2. Second carbon / hydrogen from functional group (in this case it is OH) is called BETA carbon and hydrogen present on alpha carbon is called BETA hydrogen.
3. Third carbon / hydrogen from functional group (in this case it is OH) is called GAMA carbon and hydrogen present on alpha carbon is called GAMA hydrogen.
4. Forth carbon / hydrogen from functional group (in this case it is OH) is called DELTA carbon and hydrogen present on alpha carbon is called DELTA hydrogen.
CHEMIGOD 