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B 4 Tetrahedra for Aluminum Atoms—A Surprising Substitution in τ ‐Borides Ni 20 Al 3 B 6 and Ni 20 AlB 14
Author(s) -
Hillebrecht Harald,
Ade Martin
Publication year - 1998
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/(sici)1521-3773(19980420)37:7<935::aid-anie935>3.0.co;2-0
Subject(s) - tetrahedron , crystallography , boride , crystal structure , substitution (logic) , materials science , aluminium , solid state , chemistry , metallurgy , computer science , programming language
Abstract Stabilized by the tailor‐made coordination in the crystal , B 4 tetrahedra were characterized for the first time in a solid‐state structure (shown on the right). Some of the Al atoms are replaced by B 4 tetrahedra in the cubic τ ‐boride Ni 20 AlB 14 . The B–B distances of 1.681(15) Å are similar to those in the molecular structures of B 4 Cl 4 and B 4 ( t Bu) 4 , which contain tetrahedral B 4 units.