'Not' between 'to' and bare infinitive is probably best avoided in formal contexts (exams, job application forms, etc).
MrP
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I respecfully submit that there is no sound reasoning that you can provide to substantiate this claim, Mr M. A quick google proves that SIs are commonly used in all leve
Yes, your original sentence is correct. It may look odd to you because 'not' follows the main verb. But maybe if you think of it like this, it will seem less odd:
'I decided / not to go / there.'
You could also say:
'I decided against going there.' 'I decided I wouldn't go there.'
'I respecfully submit that there is no sound reasoning that you can provide to substantiate this claim, Mr M. A quick google proves that SIs are commonly used in all levels of language.'
I agree, JTT; but if you're sitting an exam or writing an application form, it is always better to avoid split infinitives. You're unlikely to be penalised for refusing to split an infinitive; but quit