structural

  1. S

    Which structural formula is correct?

    Here is my attempt to solve the question. Which drawing is correct, 1,2 or neither? http://www.tiikoni.com/tis/view/?id=6f88953 Thank you in advance for your help.
  2. S

    correct structural formula for glycerol?

    Which one is correct? http://www.chemistry-reference.com/images/structural/glycerol.png or http://3.bp.blogspot.com/-dYtP2eeRuxc/UQvw7jbBVuI/AAAAAAAAAc0/cPEqPE980Xs/s1600/glycerol2.png