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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
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201501356
Subject(s) - yttrium , carbide , aluminide , ternary operation , covalent bond , intermetallic , materials science , substructure , aluminium , crystallography , chemistry , metallurgy , alloy , organic chemistry , structural engineering , 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.