EDIT I ' m convinced I ' m wrong with the above , but I ' m leaving it so we can cross that off the proverbial list . Here ' s what we knowOnly 2 kinds of H I ' ll call them HP and HS for pentet and singlet . One is split 4 times . The other may or may not be , but I say it is Because there are only 2 kinds of H , and HP is split , this means the HS MUST be neighboring HP and thus split in turn . However , it ' s probably safe to say it ' s no more than a doublet . One carbon can only have 4 bonds obviously , so given the pentet it ' s safe to say that this is at least a 3 carbon molecule . HP is on our central carbon the others hold HS . Symmetry is certain given only 2 kinds of H . This is out there , but here goes NH 2 NHNH 2 . Wierd as hell , but I think it works ?