Expandability of Ultralong CC Bonds: Largely Different C1C2 bond lengths determined by low-temperature x-ray structural analyses on Pseudopolymorphs of 1,1-Bis(4-fluorophenyl)-2,2-bis(4-methoxyphenyl)pyracene

Takanori Suzuki, Yasuto Uchimura, Fumika Nagasawa, Takashi Takeda, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Kei Murakoshi, Takanori Fukushima, Aiichiro Nagaki, Jun Ichi Yoshida

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11 Citations (Scopus)

Abstract

Low-temperature X-ray analyses on several pseudopolymorphs (solvate crystals) revealed that the C1C2 bond length of the highly congested title molecule can adopt quite different values [1.700(6)1.739( 6)]. Such an unusual observation indicates that the ultralong covalent bond is endowed with "expandability," thus the prestrained bond can be elongated or shortened very easily accompanied by only a minute change in energy, which can be compensated by intermolecular perturbation in the crystal.

Original languageEnglish
Pages (from-to)86-88
Number of pages3
JournalChemistry Letters
Volume43
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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