The structural chemistry of bivalent germanium, tin and lead

Harrison, Philip G.

doi:10.1016/s0010-8545(00)80318-5

Cited by 50 publications

(1 citation statement)

References 163 publications

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“…Complexes of Group IV metals show a variety of types of interaction and coordination (Harrison, 1976). In PbBr 2 · 2tu(I) the Pb... Br interactions are ionic, the Pb... thiourea interactions (specifically Pb... S) are ion-dipole and the Br... NH 2 interactions are electrostatic.…”

Section: Discussionmentioning

confidence: 99%

Crystal chemistry of thiourea complexes of lead(II) salts

Herbstein¹,

Reisner²

1984

Zeitschrift Für Kristallographie - Crystalline Materials

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Crystal data are reported for seven complexes formed between PbBr 2 and thiourea (tu) viz. PbBr 2 tu, polymorphs I and II; PbBr 2 · tu · 2H 2 0; PbBr 2 -2tu, polymorphs I and II; PbBr 2 -3tu; 3/2PbBr 2 · 2tu · 7H 2 0. The crystal structure of PbBr 2 -2tu(I) has been determined by single crystal structure analysis; the asymmetric unit is tetrameric, with two six-coordinate and two seven-coordinate lead atoms linked through bridging sulphur atoms of thioureas. These asymmetric units are linked in polymeric chains through bicoordinate Br ions. There is extensive NH... Br hydrogen bonding and/or electrostatic interaction within and between these units.

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Section: Discussionmentioning

confidence: 99%

Crystal chemistry of thiourea complexes of lead(II) salts

Herbstein¹,

Reisner²

1984

Zeitschrift Für Kristallographie - Crystalline Materials

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Lead: Inorganic ChemistryBased in part on the article Lead: Inorganic Chemistry by Philip G. Harrison which appeared in theEncyclopedia of Inorganic Chemistry, First Edition.

Bharara

Atwood

2005

Encyclopedia of Inorganic Chemistry

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This article covers basic chemistry of lead(II) including coordination geometries of halides, pseudohalides, oxides, carboxylates, thiolates, and nitrogen and/or phosphorus‐containing ligands. Coordination number around lead(II) ranges from 1 to 12 but is by no means comprehensive. Tetrahedral four‐coordination is observed only for lead(IV) compounds with bulky ligands. Lead forms halide complexes with both oxidation states but lead(IV) halides are much less stable then monomeric lead(II) halides. Like lead(II) halides, lead pseudohalides also form complexes with donor molecules and these complexes are irregular with high coordination number. Binary and ternary oxides of lead have found importance in electronic and technological applications, while polymeric lead(II) alkoxides [Pb(OR 2 )] are insoluble and poorly characterized. Ternary and mixed oxides of lead with perovskite structure are electroactive and are characterized by large dielectric constants. Lead(II) chalcogenides especially PbS, are photoconductors and widely used in photoelectric cells and IR detectors. Lead derivatives of oxyacids and organic acid, containing bivalent lead are extensively used in organic synthesis as oxidizing agents. The variable structure of highly coordinate lead(II) carboxylates and their complexes are characterized by intermolecular association. 207 Pb NMR and potentiometry have been widely employed for study of lead compounds in solution. Reduction of lead in liquid ammonia or direct fusion of various metals at 700°C results in the formation of anionic clusters. Such species have been identified with 207 Pb NMR in solution or recently by laser ablation in gaseous state.

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