SmOs2CP crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 4-coordinate geometry to four equivalent C(1) and three equivalent P(1) atoms. Os(1) is bonded in a distorted single-bond geometry to one C(1) and three equivalent P(1) atoms. C(1) is bonded to four equivalent Sm(1) and two equivalent Os(1) atoms to form a mixture of corner and edge-sharing CSm4Os2 octahedra. The corner-sharing octahedral tilt angles are 22°. P(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Os(1) atoms.
SmOs2CP crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 4-coordinate geometry to four equivalent C(1) and three equivalent P(1) atoms. All Sm(1)-C(1) bond lengths are 2.68 Å. There is one shorter (3.06 Å) and two longer (3.15 Å) Sm(1)-P(1) bond lengths. Os(1) is bonded in a distorted single-bond geometry to one C(1) and three equivalent P(1) atoms. The Os(1)-C(1) bond length is 1.89 Å. There is one shorter (2.43 Å) and two longer (2.50 Å) Os(1)-P(1) bond lengths. C(1) is bonded to four equivalent Sm(1) and two equivalent Os(1) atoms to form a mixture of corner and edge-sharing CSm4Os2 octahedra. The corner-sharing octahedral tilt angles are 22°. P(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Os(1) atoms.