This model was based on 3 strands with unionized phosphate groups in the middle holding the molecule together. This didn't make sense because if the phosphate groups still had hydrogens, DNA would not be an acid... which it is.
The problem of replication could not be worked out in triple helix.
It was a double helix.
X-ray
28th February 1953
Francis Crick
The problem of replication could not be worked out in triple helix.
Francis Crick
They found it in 1953.
James Watson And Frncis Crick
It was a double helix.
X-Ray
Watson and Crick
The first correct shape was the double helix by Watson and Crick. However, there were earlier incorrect models, for example the incorrect triple helix model proposed by Linus Pauling. Even the first model by Watson and Crick turned out to be incorrect; they had it inside out compared to the correct model.
X-ray
James Watson and Francis Crick
28th February 1953
Francis Crick