The steric influence of β-diketiminato ligands on the coordination chemistry of lead(II)

Tam, Eric C. Y.; Coles, Martyn P.; Smith, J. David; Fulton, J. Robin

doi:10.1016/j.poly.2014.08.004

Cited by 19 publications

(23 citation statements)

References 43 publications

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“…Since the original review documenting the occurrence of Pb(lp)⋯π(arene) interactions, 7 another nine structures, 24-32, [41][42][43][44][45][46][47] have appeared in the crystallographic literature having these structure-directing contacts, Fig. 5 and Table 1.…”

Section: Zero-and One-dimensional Aggregates Sustained By Pb(ii)…π(armentioning

confidence: 99%

Main group metal lone-pair⋯π(arene) interactions: a new bonding mode for supramolecular associations

et al. 2016

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Crystal structures of the heavier main group elements in low oxidation states have been evaluated for the presence of supramolecular element(lp)⋯π(arene) interactions that are structure-directing. It is revealed that when present, these interactions lead to zerodimensional, binuclear aggregates but higher-nuclearity species are sometimes observed, with one-dimensional supramolecular chains of varying topology being prominent. By contrast, two-dimensional aggregation based on element(lp)⋯π(arene) interactions are rare. In summary, interactions of main group metal lone-pairs with aromatic rings are revealed as synthons capable of assembling molecules into supramolecular aggregates. † Electronic supplementary information (ESI) available: For ESI (illustrations of supramolecular aggregation based on main group element(lone-pair)⋯π(arene) interactions for 1-157), see DOI:

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Section: Zero-and One-dimensional Aggregates Sustained By Pb(ii)…π(armentioning

confidence: 99%

Main group metal lone-pair⋯π(arene) interactions: a new bonding mode for supramolecular associations

et al. 2016

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“…On the other hand, the 207 Pb resonance for 1 was detected at +1317 ppm, i.e. in the region diagnostic of three- (11) and 2.9928(11) Å) (Tam et al, 2015). The Pb1-N1 distance is expectedly shorter for the negatively charged N amide atom (2.246 (6) (Tam et al, 2015).…”

Section: Resultsmentioning

confidence: 95%

“…The Pb1-N1 distance is expectedly shorter for the negatively charged N amide atom (2.246 (6) (Tam et al, 2015). On the other hand, the pertaining Pb-N bonds were much longer (Tam et al, 2015).…”

Section: Resultsmentioning

confidence: 97%

“…(Jana et al, 2011). A variety of terminal aryloxides , alkoxides (Tam et al, 2009), phosphides (Yao et al, 2007;Tam et al, 2012), amides and anilides (Harris et al, 2014) and alkyl (Jana et al, 2009;Taylor et al, 2015) (Tam et al, 2015). The role of mononuclear chloro complexes, in particular as precursors for salt metathesis reactions, was prominent in these studies.…”

Section: Introductionmentioning

confidence: 99%

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Heteroleptic lead(II)-halide complexes supported by a bulky iminoanilide ligand

Bellini

Carpentier

Dorcet

et al. 2017

Main Group Metal Chemistry

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“…Thus, the lead(II) atom in (10), i.e. bis(diphenylpentane-2,4-diiminato)lead(II) toluene solvate [28], is coordinated by four nitrogen atoms, but there is a large void above the lead(II) atom (Figure 14.7a), which is occupied by the toluene molecule [d = 3.66 Å and θ = 8.6°]. A relatively high coordination number is also found in (11), bis(2,4,6,8-tetra-t-butyl-1-oxo-1H-phenoxazin-9-olato)lead(II) benzene di-solvate [29], where the lead(II) is in a N 2 O 4 donor set.…”

Section: Lead(ii)mentioning

confidence: 99%

14. Solute–solvent interactions mediated by main group element(lone-pair)···π(aryl) interactions

Tiekink¹,

Zukerman-Schpector²

2017

Multi-Component Crystals

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Since the disclosure of tellurium(II, IV)···π(aryl) interactions in their crystal structures [1], there has been increasing interest in ascertaining the importance of this type of supramolecular synthon, i.e. main group element(lp)···π(arene), in the structural chemistry of main group element chemistry [2][3][4][5][6][7][8][9][10]. It is noted in passing that analogous interactions have been revealed in structural biology and are known to provide important stabilising contacts [11,12]. In molecular structural chemistry, the emphasis thus far has been upon seeking "stand-alone" element(lp)···π(arene) contacts and determining the supramolecular architectures they sustain [2][3][4][5][6][7][8][9][10]. Usually these architectures are zero-and one-dimensional; however, examples of two-and even three-dimensional aggregation patterns are known [9,10]. With the restriction that the element(lp)···π(arene) interaction operates in a given dimension within a crystal, in isolation from other supramolecular synthons, these interactions occur in a maximum of 14% of thallium(I) structures. This is reduced to 9% in bismuth(III) structures and down to a minimum of 2-3% for tin(II) and lead(II) compounds [9,10]. In terms of bonding, it is likely that the lone-pair···π interaction has similar features to halogen bonding [13] in that there is an asymmetric distribution of electron density in the lone-pair of electrons. This leaves an electropositive region at the tip of the lone-pair that interacts with the π electrons of the ring. This electron-deficient region is termed variously a σ-hole or polar cap, and the energy of stabilisation imparted by these interactions is in the region of 10 kJ mol −1 , i.e. similar to that imparted by C-H···π(aryl) interactions. In keeping with the theme of the present volume, "Aspects of Multi-Component Crystals: Synthesis, Concepts and Function", a description herein of the supramolecular architectures sustained by main group element(lp)···π(aryl) interactions is given where the π system is a solvent molecule such as benzene. ProceduresStandard protocols were utilised to identify structures for the current survey [10]. The Cambridge Structural Database (CSD: version 5.37 + 2 updates) [14] was searched using CONQUEST (version 1.18) [15]. There were two key geometric restraints, as illustrated in Figure 14.1a. The first restraint is the distance d, between the metal centre and the ring centroid, labelled Cg, which was set at 4.0 Å. This distance is shown to be suffihttps://doi

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The steric influence of β-diketiminato ligands on the coordination chemistry of lead(II)

Cited by 19 publications

References 43 publications

Main group metal lone-pair⋯π(arene) interactions: a new bonding mode for supramolecular associations

Main group metal lone-pair⋯π(arene) interactions: a new bonding mode for supramolecular associations

Heteroleptic lead(II)-halide complexes supported by a bulky iminoanilide ligand

14. Solute–solvent interactions mediated by main group element(lone-pair)···π(aryl) interactions

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