Popular social networking site Facebook snubbed the partnership offered by Google Inc, denying the search giant access to its trove of personal information, said Google Executive Chairman Eric Schmidt on Tuesday.

Schmidt said Google's search could be improved with access to Facebook's data about Web surfers' friends and acquaintances. However, he did not specify which deal in particular he was referring to, said a Reuters report.

We tried very hard to partner with Facebook, Reuters quoted Schmidt as saying. They were unwilling to do the deal, he added.

Speaking at the D9 conference organized by the blog AllThingsD, Schmidt said Google had recently renewed a partnership with Apple in which Google provides map technology featured in the iPhone.

 Schmidt, who was a former Apple board member, said their relationship had turned rough as Google began to develop its Android smartphone operating system.

Other speakers from the tech industry who attended the conference were the chief executives of Walt Disney Co, Hewlett-Packard, Twitter, Zynga, Groupon and Alibaba.