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Updated: Feb 4, 2026

Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts

Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts

Published on: February 24, 2015

高圧合成およびLa、Sm、Gd、Dy塩化物および塩化物カーバイドの構造研究

Fariia Iasmin Akbar^1,2, Alena Aslandukova^1,2, Andrey Aslandukov^1,3

¹Institute of Inorganic and Analytical Chemistry, Goethe University Frankfurt, Max-von-Laue-Straße 7, Frankfurt 60438, Germany.

|February 2, 2026

Abstract:

High-pressure synthesis provides unique pathways to materials with unprecedented structures and properties. Here we report the synthesis and structural characterization of novel rare-earth (La, Sm, Gd, Dy) chlorides, chloride carbides, and oxychloride phases obtained due to complex chemical reactions in diamond anvil cells after laser heating of rare-earth metals and NaCl at pressures of 39-127 GPa and temperatures of 2500-2800 K. Synchrotron single-crystal X-ray diffraction analysis allowed us to solve previously unknown crystal structures of binary (La₂Cl, LaCl, LaCl₃, DyCl) and ternary (DyNa₂Cl₅, Sm₂ClC₂, Gd₂ClC₂, Dy₂ClC₂, Sm₁₉ClC₁₈, Gd₁₉ClC₁₈, Dy₅Cl₃C, DyOCl) compounds. Significantly, we identified trans-polyacetylene-like carbon chains in lanthanide chloride carbides, a structural motif previously hypothesized but not observed experimentally. Our findings highlight the enhanced chemical reactivity of alkali halides under extreme conditions, uncovering novel chemical bonding and expanding the landscape of potential functional materials accessible through high-pressure synthesis.

キーワード:

高圧合成希土類塩化物塩化物カーバイド炭素鎖結晶構造

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