Anhydrous lead(II) heptanoate

Abstract

The title compound, catena‐poly­[[(heptanoato‐O,O′)­lead(II)]‐μ‐heptanoato‐O,O′:O:O′], [Pb(C7H13O2)2], is a metallic soap which can be used as a corrosion inhibitor since it forms a passive film at the Pb surface. Its structure is characterized by two‐dimensional layers parallel to the bc plane. The layers are packed through van der Waals interactions along the a direction and form blocks parallel to (001). The 6s2 lone pair of electrons on PbII is stereochemically active in this compound, which leads to a hemidirected octahedral geometry for the O‐environment around the Pb atoms.

The interaction of long chain sodium carboxylates and sodium dodecylsulfate with lead(II) ions in aqueous solutions

“…In general, the data in this figure are in agreement with the behaviour seen by electrical conductivity and turbidity, and discussed in the previous sections. From the potentiometric data, two observations are worth noting: a) for all carboxylates, the association with Pb 2+ leads to a complex with a 2:1 stoichiometry (see Table 1), which is consistent with charge neutralization [58,64]; b) potentiometry seems to be more sensitive to study the detailed interaction of Pb 2+ with C 7 COO − than the other techniques. It is interesting that K 1 for Pb 2+ :C 7 COONa system is significantly lower than all other equilibrium constants, possibly reflecting the difficulty in the formation of the complex Pb(C 7 COO) + , which is consistent with the initial need for more surfactant to induce the formation of precipitate.…”

“…As was previously observed with calcium(II), [1] these results show that although interactions between alkanoates and lead(II) are probably driven by electrostatic interactions through charge neutralization [26], and by changes in ion hydration, the effect of the alkyl chain length cannot be neglected. However, Pb 2+ is a much softer Lewis acid than Ca 2+ [57], and there is evidence from X-ray crystallography [58,59], and 207 Pb NMR spectroscopy [40,60] that the lead(II)…”

The use of lead dodecanoate as an environmentally friendly coating to inhibit the corrosion of lead objects: Comparison of three different deposition methods

“…The immersion allows the slow formation of lead dodecanoate complexes and the production of well-shaped and ordered crystals on the lead surface [18][19].…”

Short lead(ii) soaps: from weakly fluorescent crystals to strongly phosphorescent and structurally varied vitreous phases. A thermal, structural and spectroscopic study

“…Previously, only the structures of two members of the lead(II) alkanoate series, Pb(C4) 2 and Pb(C7) 2 , were known. 19,20 Pb(C3) 2 (at RT), Pb(C5) 2 and Pb(C6) 2 (at 100 K) were studied by means of single crystal X-ray diffraction (SCXRD). In addition, these last two compounds were solved at RT by high resolution powder diffraction (HRPD), as well as Pb(C3) 2 , which was re-measured by powder diffraction to conrm the structure found by single crystal diffraction at RT.…”

“…19) and Pb(C7) 2 (ref. 20) known from previous studies. These structural data of the crystal phase along with the PDF-analysis carried out in the crystal phase and in the different glasses have allowed us to compare the differences in the local structure and, therefore, explain the enhancement of the luminescent properties.…”