Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 6, Issue 11, Pages 2107-2111Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b00770
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Funding
- NASA [NNX13AE59G]
- NSF [DGE1144083]
- Welch Foundation of Houston, Texas [F-1283]
- U.S. National Science Foundation [CHE-1361031]
- Deutsche Forschungsgemeinschaft (DFG) [TH 1301/3-1, TH 1301/3-2]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1361031] Funding Source: National Science Foundation
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The rotational spectrum of the elusive but fundamentally important silicon carbide SiCSi has been detected using sensitive microwave techniques aided by high-level ab initio methods. Its equilibrium structure has been determined to very high precision using isotopic substitution and vibrational corrections calculated quantum-chemically: it is an isosceles triangle with a Si-C bond length of 1.693(1) angstrom, and an apex angle of 114.87(5)degrees. Now that all four SimCn clusters with m + n = 3 have been observed experimentally, their structure and chemical bonding can be rigorously compared. Because Si2C is so closely linked to other Si-bearing molecules that have been detected in the evolved carbon star IRC+10216, it is an extremely promising candidate for detection with radio telescopes.
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