title: A high-pressure polymorph of phosphorus nitride imide.
abstract: Phosphorus nitride imide, PN(NH), is of great scientific importance because it is isosteric with silica (SiO2). Accordingly, a varied structural diversity could be expected. However, only one polymorph of PN(NH) has been reported thus far. Herein, we report on the synthesis and structural investigation of the first high-pressure polymorph of phosphorus nitride imide, β-PN(NH); the compound has been synthesized using the multianvil technique. By adding catalytic amounts of NH4Cl as a mineralizer, it became possible to grow single crystals of β-PN(NH), which allowed the first complete structural elucidation of a highly condensed phosphorus nitride from single-crystal X-ray diffraction data. The structure was confirmed by FTIR and (31)P and (1)H solid-state NMR spectroscopy. We are confident that high-pressure/high-temperature reactions could lead to new polymorphs of PN(NH) containing five-fold- or even six-fold-coordinated phosphorus atoms and thus rivalling or even surpassing the structural variety of SiO2.
authors.affiliation: Department Chemie, Lehrstuhl für Anorganische Festkörperchemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13(D), 81377 München (Germany) http://www.cup.uni-muenchen.de/ac/schnick/
authors.forename: Alexey
authors.initials: A
authors.lastname: Marchuk
authors.forename: Florian J
authors.initials: FJ
authors.lastname: Pucher
authors.forename: Friedrich W
authors.initials: FW
authors.lastname: Karau
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schnick
keywords: high-pressure chemistry; high-temperature chemistry; nitrides; phosphorus; solid-state structures