silence
Senior Airman
Historically the Soviet Union held on during 1941 because Germany didn't quite have enough military assets to finish them off in a single campaign season and Anglo-American assistance started arriving during August 1941. Neither condition applies in this scenario. Anti communist coalition invasion force should be at least a third larger and there will be no Anglo-American economic assistance.
Plus they'd have at least an extra month to work with. Move everything up a month: suddenly the September halt is an August halt, Typhoon now starts in September, and the Germans take Khimki - 5 miles from Moscow, 20 miles from the Kremlin - November 1 instead of December 1. The winter hell of 41-42 didn't really kick into full gear until late November. All this assumes that the larger force the Germans have in this scenario will advance no faster than the historical force.
The question then becomes: with the loss of Moscow, does the USSR collapse? Even if no, they just lost their communications and transport center, the brain of the USSR if you will, making anything they try after that much more difficult.