Metal-organic porous sheets, due to their unique atomic configurations and properties, represent a class of materials beyond graphene and BN monolayers. Mo2-phthalocyanine-based sheet (Mo2Pc) is a new member of this porous organometallic family. Using density functional theory with hybrid functional for exchange-correlation potential we show that this dimer based material, unlike conventional organic monolayers that contain isolated metal atoms, possesses unique mechanical, magnetic, electronic and optical properties due to inherent anisotropy in the structure. Furthermore, it is a semiconductor with a direct band gap of 0.93 eV and is antiferromagnetic with each Mo site carrying a magnetic moment of 0.88 μB. The strong anisotropy in elasticity and infrared light absorption is likely to open new doors for potential applications.