Open Access

Table 1.

Experimental and theoretical molecular constants of phenalene.

Parameter TMC-1 Lab TMC-1+Lab Theorya
A/MHz 1108.1199(12)b 1108.12409(26) 1108.12404(29) 1108.6
B/MHz 1067.81464(72) 1067.81150(22) 1067.81175(23) 1067.3
C/MHz 545.85572(15) 545.85649(12) 545.85613(11) 545.6
ΔJ/Hz 19.10(63) [19.18] 20.21(27) 19.18
ΔJK/Hz −29.5(13) [−29.26] −31.30(64) −29.26
ΔK /Hz 12.20(70) [11.94] 13.07(38) 11.94
δJ/Hz [−0.237]c [−0.237] [−0.237] −0.237
δK/Hz [−20.56] [−20.56] [−20.56] −20.56
Nt, Nf d 267,71 100,55 367,126
σe/kHz 6.2 6.6 7.4
μa,μb/D 0.67,0.36
κ 0.86 0.86 0.86 0.85
Δcf/amuÅ2 −3.5051(9) −3.5060(4) −3.5054(4) −3.1
(a)

Notes.Values of the rotational constants A, B, and C calculated theoretically correspond to the equilibrium rotational constants Ae, Be, and Ce.

(b)

The uncertainties (in parentheses) are in units of the last significant digits.

(c)

Values in brackets were not determinable and were thus fixed to the theoretically calculated ones.

(d)

Nt and Nf refer to the number of distinct rotational transitions and unique transition frequencies, respectively, in the fit.

(e)

Standard root mean square deviation of the fit.

(f)

Inertial defect, Δc,=Ic-Ib-Ia. The conversion factor is 505379.1 MHz amu Å2.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.