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YAlC: A Bonding Chameleon with Heteropolyacetylene Features
Author(s) -
Kotyrba Martin R.,
CuervoReyes Eduardo,
Nesper Reinhard
Publication year - 2015
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.201501356
Subject(s) - yttrium , carbide , aluminide , ternary operation , covalent bond , materials science , substructure , intermetallic , aluminium , crystallography , metallurgy , chemistry , alloy , structural engineering , organic chemistry , computer science , engineering , programming language , oxide
YAlC was prepared by a flux method. It crystallizes as a partially filled‐up TlI structure, showing remarkable structural aspects at the border between Zintl phases and intermetallics. This novel ternary aluminide–carbide exhibits a unique one‐dimensional multi‐center bond and a polyacetylene‐related aluminum carbide substructure. The different functionalities of aluminum and of yttrium are quite remarkable. While the latter behaves more like a trivalent ion, aluminum contributes considerably to covalent bonding with carbon. Still yttrium d states contribute, but hardly in a directed manner.