Materials Data on PbC4O5 by Materials Project
(C)2PbC2O5 crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of four ethyne molecules and two PbC2O5 ribbons oriented in the (0, 1, 0) direction. In each PbC2O5 ribbon, Pb2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Pb–O bond distances ranging from 2.41–3.15 Å. There are two inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.27 Å) and one longer (1.29 Å) C–O bond length. In the second C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.27 Å) and one longer (1.28 Å) C–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Pb2+ and one C2+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to two equivalent Pb2+ and one C2+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Pb2+ atoms. In the fourth O2- site, O2- is bonded in a single-bond geometry to three equivalent Pb2+ and one C2+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Pb2+ and one C2+ atom.