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High‐Pressure Synthesis of a Nitrogen‐Rich Inclusion Compound ReN 8 ⋅ x N 2 with Conjugated Polymeric Nitrogen Chains
Author(s) -
Bykov Maxim,
Bykova Elena,
Koemets Egor,
Fedotenko Timofey,
Aprilis Georgios,
Glazyrin Konstantin,
Liermann HannsPeter,
Ponomareva Alena V.,
Tidholm Johan,
Tasnádi Ferenc,
Abrikosov Igor A.,
Dubrovinskaia Natalia,
Dubrovinsky Leonid
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201805152
Subject(s) - rhenium , nitrogen , diamond anvil cell , chemistry , crystallography , x ray crystallography , molecule , ab initio , crystal structure , diamond , diffraction , inorganic chemistry , organic chemistry , physics , optics
Abstract A nitrogen‐rich compound, ReN 8 ⋅x N 2 , was synthesized by a direct reaction between rhenium and nitrogen at high pressure and high temperature in a laser‐heated diamond anvil cell. Single‐crystal X‐ray diffraction revealed that the crystal structure, which is based on the ReN 8 framework, has rectangular‐shaped channels that accommodate nitrogen molecules. Thus, despite a very high synthesis pressure, exceeding 100 GPa, ReN 8 ⋅x N 2 is an inclusion compound. The amount of trapped nitrogen (x) depends on the synthesis conditions. The polydiazenediyl chains [−N=N−] ∞ that constitute the framework have not been previously observed in any compound. Ab initio calculations on ReN 8 ⋅x N 2 provide strong support for the experimental results and conclusions.