ACS members get 25 complimentary free issues of ACS journals per year. Go to
www.acs.org and log in (you may have to sign up if you don't have an account), click on the "journals" tab, and find the article of interest. Upon trying to download it, you will be informed that you don't have access, but there's a button to click if you want to use your complimentary copy option.
Unfortunately, it only works if you're a member, and only on the ACS journals.