1x11 speed road bike conversion I  am converting my 52x42 12 speed to 1x11 speed. 

I am wanting to put a 46t chainring on the crank. 

My question is will the 11speed chain run on this chainring which is 3/32" thick.
Yes. 11-speed chains are still 3/32" chains, which means the inside width of the inner link is 3/32". 

However, consider that we're now living in the age of narrow-wide rings. They make one-by setups run way better.