Microwave spectrum, structure and nuclear quadrupole coupling coefficients of nitrosyl bromide

Abstract

Microwave spectra of the following isotopic species of nitrosyl bromide have been measured and assigned : ¹⁴N¹⁶O⁷⁹Br, ¹⁴N¹⁶O⁸¹Br, ¹⁵N¹⁶O⁷⁹Br and ¹⁵N¹⁶O⁸¹Br. Rotational constants are reported and have been used to evaluate the structure in a number of ways. The following structure is reported: r_N–Br= 2.140±0.002 Å, _rN–O= 1.146±0.010 Å and ∠ONBr = 114° 30′±30′ From the hyperfine structure of the spectra, bromine nuclear quadrupole coupling coefficients have been obtained for the four isotopic species. The coupling parameters have been interpreted in terms of bond properties and a close comparison can be made with nitrosyl chloride.