Google is not interested in pursuing an acquisition of Facebook, Google co-founder Sergey Brin told CNBC, though the entrepreneur left open the possibility that Google would be open to talks with Facebook if the social networking site made the first move.

Google executives "don't look at companies for acquisition unless they are really interesting," Brin told CNBC's Julia Boorstin. "I think they [Facebook] are doing well on their own," he added.