Bent-shaped particles gain more and more interest nowadays
due to the formation of novel liquid crystalline structures. Here, we investigate impact of molecular shape and conformational degrees of freedom on stabilization of nematic phases in two dimensional systems. Analyzed particles are composed of two and three arms built of either hard disks or hard needles. Additionally, they have infinite amount of possible conformations. We compare hard disks and hard needles models, analyze impact of molecular shape, conformations and barrier between conformers on phase transition density, order parameters, probability distribution functions of different conformers and radial distribution functions.