The Russian proposal involves Syria signing the CWC. The Security Council can *not* stop Syria from doing that, nor can it subsequently impose UN Inspectors when the CWC itself insists that the inspection regime is carried out by the OPCW. Get it? Russia can just keep vetoing "western" attempts to hijack this deal, in which case The Deal Gets Carried Out Anyway.
from the article: Russia withdraws request for emergency UN Syria meeting