[en] Mercury 4-phenyl-8-mercaptoquinolinate has been synthesized, its monocrystals have been obtained. The crystal structure of the title compound has been determined by the X-ray diffraction method (automatic diffractometer Syntex P1. MoK_α radiation). The crystals belong to monoclinic syngony. The unit cell parameters are: a=12.215(2), b=20.981(5), c=9.705(2) A; γ=101.38(2)deg; V=2438.6(9) A³; space group A2/a, Z=4; R=0.024. The coordination polyhedron of the mercury atom is a strongly distorted tetrahedron 2S+2N. Bond lengths: Hg-S 2.362(1) and Hg-N 2.501(2) A, bond angle SHgN is 78.7(2) deg. The angles between the coordination planes S(1)HgN(1) and S(2)HgN(2) amount tp 89.9 deg. The five-membered chelate rings are not planar, the declination from the S...N line is 9.1 deg. The structure of mercury 4-phenyl-8-mercaptoquinolinate is compared with the structures of the previously studied mercury complexes with 8-mercaptoquinoline and its derivates, to juxtapose their molecular and crystal structures and to determine some regularities of their spatial structure depending on the nature of substituents and their location in the quinoline ring. (authors)