Is this Newman projection energy profile for 2,3-dihydroxypropanal correct?

Is this Newman projection energy profile for 2,3-dihydroxypropanal correct?


Also, I was to identify *R*/*S* configuration for the initial Newman projection. I am pretty sure it is *R*, but I need help here as well.


[![](https://i.stack.imgur.com/CewSe.jpg)](https://i.stack.imgur.com/CewSe.jpg)




There seems to be only one problem. The 240° conformer\* will be lower in energy as compared to the 120° conformer as there will be hydrogen bonding between the two hydroxyl groups
. 
Rest all looks good. 


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