2-Methyl-3-(3-methyl­phen­yl)acrylic acid

The crystal structure of the title compound, C(11)H(12)O(2), consists of dimers which are formed due to inter­molecular O—H⋯O hydrogen bonding. The dimers are linked to each other by C—H⋯O hydrogen bonds, where C—H belongs to the benzene ring and the O atom is of a carbonyl group of an adjoining mol­ecule. There exist two inter­molecular C—H⋯O hydrogen bonds which form five-membered rings. There exist two π–π inter­actions between the benzene rings. The perpendicular distance in these inter­actions are 3.006 and 3.396 Å. There also exist C—H⋯π and C—O⋯π inter­actions.