Journal ArticleDOI
Die Kristall- und Molekülstruktur des Hexaphenyldiplumbans
TLDR
The crystal and molecular structure of (C6H5)6Pb2 (space group and lattice parameters see above) has been newly determined from 4541 independent reflexes by the heavy atom method; the positions of all atoms, except the H atoms have been refined to give R = 0.053 as mentioned in this paper.Abstract:
Die Kristall- und Molekulstruktur von (C6H5)6Pb2 (Raumgruppe P21/c [C]; a = 17,16(1), b = 9,410(2), c = 21,60(2) A; β = 116,8(2)° Z = 4 [1, 2]) wurde anhand von 4541 unabhangigen Reflexen nach der Schweratommethode neu bestimmt und die Atomlagen bis auf die der Wasserstoffatome ermittelt (R-Wert = 0,053).
Die Elementarzelle enthalt zwei kristallographisch unabhangige Molekeln. Die Mittelwerte der Bindungsabstande bzw. -winkel betragen Pb–Pb = 2,844 A, Pb–C = 2,222 A; Pb–Pb–C = 110,2°, C–Pb–C = 108,7°.
Crystal and Molecular Structure of Hexaphenyldiplumbane
The crystal and molecular structure of (C6H5)6Pb2 (space group and lattice parameters see above) has been newly determined from 4541 independent reflexes by the heavy atom method; the positions of all atoms, except the H atoms have been refined to give R = 0.053. The unit cell contains two crystallographically independent molecules. (Mean values of bond lengths and angles see above).read more
Citations
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Journal ArticleDOI
π-Bonding and the Lone Pair Effect in Multiple Bonds Involving Heavier Main Group Elements: Developments in the New Millennium
Roland Fischer,Philip P. Power +1 more
TL;DR: The key unifying feature of almost all molecules discussed in this review is that they are generally stabilized by the use of bulky substituents which block associative or various decomposition pathways.
Journal ArticleDOI
Synthesis and Characterization of 2,6-Trip2H3C6PbPbC6H3-2,6-Trip2 (Trip = C6H2-2,4,6-i-Pr3): A Stable Heavier Group 14 Element Analogue of an Alkyne
TL;DR: The Stable Heavier Group 14 Element Analogue of an Alkyne (SHE 14) as discussed by the authors is a stable heavier group 14 analogue of an alkyne.
Journal ArticleDOI
Bonding and Reactivity of Heavier Group 14 Element Alkyne Analogues
TL;DR: In this paper, a short review of recent developments in the synthesis and spectroscopic characterization, as well as the bonding and reactivity, of heavier group 14 element alkyne analogues (REER, R = large aryl or silyl group; E = Si−Pb) are summarized.
Journal ArticleDOI
Germanium and tin analogues of alkynes and their reduction products.
Lihung Pu,Andrew D. Phillips,Anne F. Richards,Matthias Stender,Richard S. Simons,Marilyn M. Olmstead,Philip P. Power +6 more
TL;DR: The reduction of terphenylgermanium( II) or terphenyltin(II) chlorides with alkali metals was investigated and it was concluded that the M-M bond lengths in 3-7 and 10-16 are dependent on several factors that include Germanium species 3 and 4 and changes in the Ge-Ge and Sn-Sn bond lengths.
Journal ArticleDOI
From a Cyclotrisilane to a Cyclotriplumbane: Low Coordination and Multiple Bonding in Group 14 Chemistry
TL;DR: In less than three decades, the chemistry of low-coordinated compounds of the heavier elements of group 14 has made unforeseen and unprecedented advances as mentioned in this paper, including homonuclear double bonds between all elements of this group and the first examples of compounds analogous to the alkynes have been isolated.
References
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TL;DR: In this paper, the Hartree-Fock wave function was used to compute X-ray scattering factors for neutral atoms from He to Lw and for most of the chemically significant ions through Lu3+ through Lu 3+.
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TL;DR: In this paper, relativistic calculations of the photoelectric cross section have been made and the integral for the principal contribution to Δf′ has been evaluated numerically without approximation to the form of the cross section-vs-energy curve, as has been done in previous calculations.
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TL;DR: In this paper, the electron structure factor for forward scattering for a crystal containing ionized atoms is derived and a parametric fit to these is given in the range of sin θ/λ from 0.0 to 2.0 A−1.
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Some Revisions of the Covalent Radii and the Additivity Rule for the Lengths of Partially Ionic Single Covalent Bonds
Verner Schomaker,D. P. Stevenson +1 more
TL;DR: The body of this paper is devoted to further discussion, a more detailed consideration of the covalent radii, and a rather extensive but quite incomplete comparison of observed bond distances with the values given by the additivity rule and by Equation 1.