181 1 ' Spartein . 2 THF kristallisieu in der monoklinen Raumgruppe P2,, u = 921.6(10), b =1766.7(10), r =1098(2)pm, fi =107.65(7)", V = 1703(4) A', Z = 2, Q~~~. =1.127 g~m -~ fur M = 577.8, p = 0.498 mm-'. An einem Kristall der GroBe 0.6 x 0.4 x 0.3 mm wurden auf einem EN-
RAF-NONIUS-Vierkreisdiffraktometermit Graphit-monochromatisierter Cu,,-Strahlung bei 163 K 4606 Reflexe vermessen, von denen 4279 unabhingig (R,,, = 0.0533) und 3467 beobachtet ( F > 4u(F/) waren. Losung (PATSEE) [9] und Verfeinerung im SHELXTL PLUS (VMS)-Programmsystem [lo], R = 0.0837, wR = 0.0764, Nicht-Wasserstoffatome
The following nuclear and molecular constants have been obtained from microwave measurements of the pure rotational spectra of C1CN (7=2-3 transition), BrCN (7=3-4), and ICN (7 = 4-5). The moments of inertia from the ground vibrational states are, in g-cm 2 .0T2. The interatomic distances in A for the ground vibrational states are dca-1.630, dew-1.163, for C1CN; dcBr = 1.789, dew = 1.160, for BrCN; and
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.