Zinnhalogenverbindungen. II. Die Molekül- und Kristallstrukturen von Zinn(IV)-bromid und -iodid

Reuter, Hans; Pawlak, R.

doi:10.1524/zkri.216.1.34.18992

Cited by 23 publications

(12 citation statements)

References 5 publications

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“…Using these approximations, we find γ to be 0.59, only 7% larger than γ in SrSi 2 . If instead the radius of SnI 4 is approximated as the average Sn–I bond length in an individual tetrahedron (2.66 Å), γ is 0.53, which is even closer to the values for SrSi 2 and BaSi 2 .…”

Section: Resultssupporting

confidence: 55%

“…47 We find no structural evidence of charge transfer between C 60 and SnI 4 . Using r 0 = 2.70 and b = 0.37, 48 the bond valence sum of SnI 4 is 4.51 in C 60 (SnI 4 ) 2 compared to 4.44 in pure SnI 4 at 295 K , 49 indicating that Sn remains in the 4+ oxidation state in C 60 (SnI 4 ) 2 . One of the two independent I atoms resolves with disorder and has refined occupancies of 0.752(9) and 0.248 (9).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C₆₀ and SnI₄

Straus

Cava

2020

J. Am. Chem. Soc.

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The design of new chiral materials usually requires stereoselective organic synthesis to create molecules with chiral centers. Less commonly, achiral molecules can self-assemble into chiral materials, despite the absence of intrinsic molecular chirality. Here, we demonstrate the assembly of high-symmetry molecules into a chiral van der Waals structure by synthesizing crystals of C60(SnI4)2 from icosahedral buckminsterfullerene (C60) and tetrahedral SnI4 molecules through spontaneous self-assembly. The SnI4 tetrahedra template the Sn atoms into a chiral cubic three-connected net of the SrSi2 type. Our results represent the remarkable emergence of a self-assembled chiral material from two of the most highly symmetric molecules, demonstrating that almost any molecular, nanocrystalline, or engineered precursor can be considered when designing chiral assemblies.

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Section: Resultssupporting

confidence: 55%

Section: ■ Results and Discussionmentioning

confidence: 99%

Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C₆₀ and SnI₄

Straus

Cava

2020

J. Am. Chem. Soc.

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“…1 /c; Z ¼ 4 42 P2 1 /c; Z ¼ 443 Pa 3; Z ¼ 844 P 43m; Z ¼ 1 45 Site symmetry of E 43m Arrangement of E/X cp/ccp Space group; Z Pb octahedral C2/c; Z ¼ 4 46 unstable 7 unstable 7 Site symmetry of E coord. for E 2 Arrangement of E/X ccp/ccp a Abbreviations for (distorted) structure types: ccp -cubic closed packing; hcp -hexagonal closed packing; bcc -body centred cubic packing as in W; cp -cubic primitive as in Po; s like S partial structure in pyrite (FeS 2 ); 'hcp' -an intergrowth of mainly hcp with ccp.…”

mentioning

confidence: 99%

Packing of tetrahedral EX4 molecules with E = C, Si, Ge, Sn, Pb and X = F, Cl, Br, I

2008

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“…The packing of SnI4 tetrahedra in C60(SnI4)2 is markedly different than in pure SnI4. In crystalline SnI4, 46 each SnI4 tetrahedron has a single nearest-neighbor that has staggered I atoms, a Sn-Sn distance of 5.465(3) Å, and a dihedral angle of 60° ( Figure S4a). They each also have 6 next nearest-neighbors with a Sn-Sn distance of 6.819(1) Å and dihedral angles of 30.62(9)° ( Figure S4b), and there also 6 next-next nearest neighbors that are equivalent under translation, are separated by 7.514(2) Å, and have eclipsed I atoms ( Figure S4c).…”

Section: Resultsmentioning

confidence: 99%

Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C60 and SnI4

Straus

Cava²

2020

Preprint

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The design of new chiral materials usually requires stereoselective organic synthesis to create molecules with chiral centers. Less commonly, achiral molecules can self-assemble into chiral materials, despite the absence of intrinsic molecular chirality. Here, we demonstrate the assembly of high-symmetry molecules into a chiral van der Waals structure by synthesizing crystals of C60(SnI4)2 from icosahedral buckminsterfullerene (C60) and tetrahedral SnI4 molecules through spontaneous self-assembly. The SnI4 tetrahedra template the Sn atoms into a chiral cubic three-connected net of the SrSi2 type that is held together by van der Waals forces. Our results represent the remarkable emergence of a self-assembled chiral material from two of the most highly symmetric molecules, demonstrating that almost any molecular, nanocrystalline, or engineered precursor can be considered when designing chiral assemblies.

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Zinnhalogenverbindungen. II. Die Molekül- und Kristallstrukturen von Zinn(IV)-bromid und -iodid

Cited by 23 publications

References 5 publications

Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C₆₀ and SnI₄

Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C₆₀ and SnI₄

Packing of tetrahedral EX4 molecules with E = C, Si, Ge, Sn, Pb and X = F, Cl, Br, I

Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C60 and SnI4

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