The choice of to not or not to basically depends on what one is trying to emphasize. People often get confused about these phrases and mess up their sentences. While they may look like the same thing, they can have some differences.
To not or not to: what is the difference?
Before getting into the difference between the two phrases to not and not to, it is important to learn about to. The word to is basically the infinitive form of a verb, such as to run, to eat, to dance, etc.
The infinitive to is typically written right next to the verb, as seen in the above examples. They all go like to+verb (run), to+verb (eat). It is said that they should not be separated by adverbs like not or any other word in a sentence. That means one should prefer writing, “She asked me not to write.” Here, the phrase not to is justified.
However, it is possible to change the scenario. Adverbs like not can come in between the verbs to form a split infinitive. That means one can write, “she asked to not write.” Here, the phrase to not is justified.
Although they look the same, there is one difference. When we use not to, the typical form, we emphasize that “she asked.” But on the other hand, with to not, we emphasize that I should not write.
So, this is the basic difference.