Reactions
Addition of chloride ions to a suspension of PbCl2 gives rise to soluble complex ions. In these reactions the additional chloride (or other ligands) break up the chloride bridges that comprise the polymeric framework of solid PbCl2(s).
- PbCl2(s) + Cl- → -(aq)
- PbCl2(s) + 2 Cl- → 2-(aq)
PbCl2 reacts with molten NaNO2 to give PbO:
- PbCl2(l) + 3 NaNO2 → PbO + NaNO3 + 2 NO + 2 NaCl
PbCl2 is used in synthesis of lead(IV) chloride (PbCl4): Cl2 is bubbled through a saturated solution of PbCl2 in aqueous NH4Cl forming 2. The latter is reacted with cold concentrated sulfuric acid (H2SO4) forming PbCl4 as an oil.
Lead(II) chloride is the main precursor for organometallic derivatives of lead, such as plumbocenes. The usual alkylating agents are employed, including Grignard reagents and organolithium compounds:
- 2 PbCl2 + 4 RLi → R4Pb + 4 LiCl + Pb
- 2 PbCl2 + 4 RMgBr → R4Pb + Pb + 4 MgBrCl
- 3 PbCl2 + 6 RMgBr → R3Pb-PbR3 + Pb + 6 MgBrCl
These reactions produce derivatives that are more similar to organosilicon compounds, i.e. that Pb(II) tends to disproportionate upon alkylation.
Read more about this topic: Lead(II) Chloride
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