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I've been trying to work out the usage of にともなう, にともなって, and so on, but am having difficulty understanding the difference between placing the particle の after a verb and before にともなう. One grammar resource that I have only gives the usage with の as examples, while another only gives the usage without it as examples.
The first gives as an example: マラソン大会が行われるのに伴って、この道路は通行止めになります。
The second gives as an example: 秋が深まるにともなって、山の紅葉が進む。
Is there a general rule for when to use each of these patterns?
The particle に does not usually readily take on a postposition to a verb. That is why the nominaliser の comes in to "rescue" the situation. Then as the structure becomes formed, the nominalisation is implicitly understood and forms the zero-nominalised form without the の.
Zero-nominalisation is when nominalisation occurs without an overt particle.
If you have A Dictionary of Intermediate Japanese Grammar, I think you can refer to page 291. There is a similar situation with には and のには. The dictionary notes that there is no difference between them.
Consider:
It takes a considerable amount of time in order to learn Japanese
日本語を習うのにはかなりの時間がかかる (with overt nominalisation)
日本語を習うにはかなりの時間がかかる (zero-nominalisation)
The meaning is the same for both of them.
に version is attaching to the 連体形, and the のに version is attaching to the 終止形.