Bi2Pt(hP9) by Lowerature Reduction of Bi13Pt3I7: Reinvestigation of the Crystal Structure and Chemical Bonding Analysis

Kaiser M, Baranov AI, Ruck M (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Zeitschrift für Anorganische und Allgemeine Chemie Wiley

Book Volume: 640

Pages Range: 2742-2746

Journal Issue: 14

DOI: 10.1002/zaac.201400331

Abstract

Bi2Pt(hP9) or γ-Bi2Pt is a higherature modification, which is metastable below 420 C. We obtained Bi2Pt(hP9) by reducing the layered bismuth subiodide Bi13Pt3I7 with a high excess of n-butyllithium at 70 C. The crystals endure the heterogeneous reaction and the enormous mass loss. X-ray diffraction on a small single-crystal revealed that Bi2Pt(hP9) crystallizes in the acentric trigonal space group P31m (no. 157) with a = 657.30(7) pm and c = 616.65(7) pm. Although structure and stacking of the layers of edge-sharing [PtBi6/3] octahedra resemble the 1H-polytype of CdI2, Pt-Pt bonding interactions cause distortions that introduce polarity to the structure. Quantum chemical calculations followed by real-space bonding analysis reveal polar covalent bonding between bismuth and platinum atoms that is not limited to nearest neighbor atoms but is essentially delocalized. The Pt-Pt bond strength in Bi2Pt(hP9) is not much weaker than in the element.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Kaiser, M., Baranov, A.I., & Ruck, M. (2014). Bi2Pt(hP9) by Lowerature Reduction of Bi13Pt3I7: Reinvestigation of the Crystal Structure and Chemical Bonding Analysis. Zeitschrift für Anorganische und Allgemeine Chemie, 640(14), 2742-2746. https://doi.org/10.1002/zaac.201400331

MLA:

Kaiser, Martin, Alexey I. Baranov, and Michael Ruck. "Bi2Pt(hP9) by Lowerature Reduction of Bi13Pt3I7: Reinvestigation of the Crystal Structure and Chemical Bonding Analysis." Zeitschrift für Anorganische und Allgemeine Chemie 640.14 (2014): 2742-2746.

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