You're fooling yourself if you think Russia is going to do that. Here's how it will play out. Syria will invite bungling UN inspectors into the country and show them a couple of warehouses full of out-of-date chem warfare relics from the 1950s. They then suggest other possible places that chemical weapons could be, sending UN inspectors on a wild goose chase for years. At some point, Assad will kick the UN inspectors out of the country, claiming that there are no weapons left, and some later Administration will have to deal with it. John Kerry could not possibly have played it more wrong than he did.
I will post a story that explains it much better and ping you on it.