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Cationic Pb 2 Dumbbells Stabilized in the Highly Covalent Lead Nitridosilicate Pb 2 Si 5 N 8
Author(s) -
Bielec Philipp,
Nelson Ryky,
Stoffel Ralf P.,
Eisenburger Lucien,
Günther Daniel,
Henß AnnKathrin,
Wright Jonathan P.,
Oeckler Oliver,
Dronskowski Richard,
Schnick Wolfgang
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201812457
Subject(s) - crystallography , cationic polymerization , covalent bond , nitride , synchrotron , metal , crystal (programming language) , crystal structure , chemistry , materials science , single crystal , nanotechnology , physics , metallurgy , organic chemistry , layer (electronics) , computer science , nuclear physics , programming language
Due to the weak oxidative force of N 2 , nitrides are only typically formed with the less electronegative metals. Meeting this challenge, we here present Pb 2 Si 5 N 8 , the first nitridosilicate containing highly electron‐affine cations of a metal from the right side of the Zintl border. By using advanced synchrotron X‐ray diffraction, the crystal structure was determined from a tiny single crystal of 1×3×3 μm 3 in size, revealing a significantly different bonding situation compared to all other nitridosilicates known so far. Indeed, DFT calculations confirm distinct amounts of covalency not only between Pb and N but also between formal Pb 2+ cations. Thus, unprecedented cationic Pb 2 dumbbells with a stretching vibration at 117 cm −1 were found in Pb 2 Si 5 N 8 , the first representative of a crystallographically elucidated lead nitride, stabilized by high amounts of covalency.