Talk:Lead dioxide

Article name

Please discuss any concerns about the article name here. Vsmith (talk) 01:44, 7 April 2010 (UTC)

I have a problem with this name is because this chemical is an ionic compound not a molecular compound. The prefix "di" shouldn't be used to name ionic compound. Plus, the ion lead has multiple charges. The correct name should be "Lead(IV) Oxide" I use the roman numeral (IV) means that the lead ion has a +4 charge. --Flushing258 (talk) 03:05, 13 April 2010 (UTC)

A few points:

• You have not given a reliable source that says PbO₂ is ionic — it may seem obvious from school-level chemistry, where you think of most inorganic compounds as ionic, i.e. [Pb⁴⁺][O²⁻]₂, but this a gross simplification. See Ionic bond: "Pure ionic bonding is not known to exist. All ionic compounds have a degree of covalent bonding." I will try and find a reliable source that explicitly discusses the degree of separation of charge in PbO₂, but in general I believe the greater the formal charge on the ion (i.e. especially pronounced with a formal tetracation like Pb⁴⁺), the less likely it is to find fully ionic bonding. The energy required to ionise Pb to Pb⁴⁺ and 2O to 2O²⁻ probably cannot be compensated for by the energy gained from forming Pb⁴⁺···O²⁻ ionic bonds. Structure determinations:

• Solid State Sciences (2005) 7, 1363–1368: High-pressure synthesis of α-PbO₂ and its crystal structure at 293, 203, and 113 K from single crystal diffraction data.
• J. Alloys Compd. (2004) 377, 17–20: Hydrothermal crystal growth of the high-pressure phases of α-PbO₂ and TiO₂ II.
• J. Phys.: Condens. Matter (1996) 8, 1631–1646: The high-pressure phase transition sequence from the rutile-type through to the cotunnite-type structure in PbO₂.
• Solid State Commun. (2000) 115, 423–426: Transport properties of bismuth-doped β-lead dioxide.
• Mater. Res. Bull. (1982) 17, 769–784: The crystal structures of lead dioxides from the positive plate of the lead/acid battery.
• Acta Cryst. (1980). B36, 2394–2397: Powder neutron diffraction study of chemically prepared β-lead dioxide.

• You have not given a reliable source to suggest that "lead dioxide" is an inappropriate name for an ionic compound.

• Lead(IV) means Pb is in the +4 oxidation state, which is not exactly the same thing as saying lead has a +4 charge. "Lead(IV) oxide" would be an acceptable name for PbO₂, but it is not necessarily preferable to "lead dioxide", and "lead dioxide" is certainly not wrong.

• Only the first letter of article titles is capitalised, so it would be "Lead(IV) oxide", not Lead(IV) Oxide".

For these reasons, I oppose any move to Lead(IV) Oxide.

Ben (talk) 11:20, 13 April 2010 (UTC)

See Wikipedia:Naming conventions (chemistry) --Rifleman 82 (talk) 16:00, 13 April 2010 (UTC)

Anhydrous plumbic acid

I've never heard this name used but I suppose it is analagous to Chromium trioxide and Chromic acid. Biscuittin (talk) 19:02, 23 November 2014 (UTC)

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