The Dibasic lead Phosphite, with the CAS registry number 12141-20-7 and EINECS registry number 235-252-2, has the systematic name of lead(2+) phosphonate - oxo-λ²-plumbane (1:2). It is a kind of Inorganics, and the molecular formula of this chemical is HO₅PPb₃. What's more, it is usually used as heat stabilizer in the synthesis of PVC, and it has a good inoxidability and exceptionally good weatherability.

The physical properties of Dibasic lead Phosphite are as followings: (1)#H bond acceptors: 5; (2)#H bond donors: 2; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 120.8 Å².

Preparation: First, you should get litharge and orthophosphorous acid. Then, add litharge and water into reactor, and heat to 70°C. Add orthophosphorous acid in the presence of acetic acid with stirring until the ph is about 6.9. And after a series of dehydration, filtration and drying, you can get the product:
2Pb+O₂→2PbO
PCl₃+3H₂O→H₃PO₃+3HCI
3PbO+H₃PO₃[HAc]→2PbO^.PbHPO₃^.0.5H₂O+0.5H₂O

You can still convert the following datas into molecular structure:
(1)SMILES: [O-]P(=O)[O-].O=[Pb].O=[Pb].[PbH2+2]
(2)InChI: InChI=1/H3O3P.2O.3Pb.2H/c1-4(2)3;;;;;;;/h4H,(H2,1,2,3);;;;;;;/q;;;;;+2;;/p-2/rH3O3P.2OPb.H2Pb/c1-4(2)3;2*1-2;/h4H,(H2,1,2,3);;;1H2/q;;;+2/p-2
(3)InChIKey: VAOOPULOMAMBPQ-TUZRSDEQAU