Metalloles are metallacycle derivatives of cyclopentadiene in which the carbon atom at position 5, the saturated carbon, is replaced by a heteroatom.[1] In contrast to its parent compound, the numbering of the metallole starts at the heteroatom. Some of these compounds are described as organometallic compounds, but in the list below quite a number of metalloids are present too. Some metalloles are fluorescent.[2] Polymeric derivatives of pyrrole and thiophene are of interest in molecular electronics. Metalloles, which can also be viewed as structural analogs of pyrrole, include:
Calculated geometry and inversion barrier energy E for some C4H4MH metalloles[3]
↑Dubac, Jacques; Laporterie, Andre; Manuel, Georges (1990). "Group 14 Metalloles. 1. Synthesis, Organic Chemistry, and Physicochemical Data". Chemical Reviews90: 215–263. doi:10.1021/cr00099a008.
↑Tracy, Henry J.; Mullin, Jerome L.; Klooster, Wim T.; Martin, James A.; Haug, Judith; Wallace, Scott; Rudloe, Isaac; Watts, Kimberly (2005). "Enhanced Photoluminescence from Group 14 Metalloles in Aggregated and Solid Solutions". Inorganic Chemistry44 (6): 2003–2011. doi:10.1021/ic049034o. PMID15762727.
↑Pelzer, Silke; Wichmann, Karin; Wesendrup, Ralf; Schwerdtfeger, Peter (2002). "Trends in Inversion Barriers IV. The Group 15 Analogous of Pyrrole". The Journal of Physical Chemistry A106 (26): 6387. doi:10.1021/jp0203494. Bibcode: 2002JPCA..106.6387P.
↑Atwood, Jerry L.; Hunter, William E.; Alt, Helmut; Rausch, Marvin D. (1976). "The molecular structure of 1,1-bis(.eta.5-cyclopentadienyl)-2,3,4,5-tetraphenyltitanole and its hafnium analogue". Journal of the American Chemical Society98 (9): 2454–2459. doi:10.1021/ja00425a012. Bibcode: 1976JAChS..98.2454A.
↑"Kristallstruktur, 1H-NMR- und Massenspektrum von Tricarbonylferracyclopentadien-tricarbonyleisen, C4H4Fe2(CO)6". J. Organomet. Chem.108 (2): 213–23. 1976. doi:10.1016/S0022-328X(00)82143-9.
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