1-Methylpyrroles, in which the 2-position is occupied by a pentafluorocyclotriphosphazenyl (1a), heptafluorocyclotetraphosphazenyl (1b), nonafluorocyclopentaphosphazenyl (1c), or undecafluorocyclohexaphosphazenyl group (1d), have been prepared from 2-lithio-1-methylpyrrole and the corresponding fluorophosphazene. Crystals of 1b are monoclinic, a = 17.300(2), b = 5.0281(3), c = 16.902(2) Å, β = 108.904(4)°, Z = 4, space group P2/n. The structure was solved by direct methods and was refined by full-matrix least-squares procedures to R = 0.038 and Rw = 0.047 for 1167 observed reflections. The N4P4 ring is nearly planar. The P—N bond lengths (corrected for libration) range from 1.524(5) to 1.562(5) Å with a mean value of 1.541(17) Å, and the mean ring angles are 122.9(20)° at phosphorus and 146.4(23)° at nitrogen. The geometry of the 1-methylpyrryl group shows no unexpected features, but the P—C bond (1.756(5) Å) is significantly shorter than in typical P-phenyl derivatives, and the P—F bond at the same atom is comparatively long (1.561(4) Å). Conjugative electron release from the pyrryl group, involving pπ–dπ bonding, is indicated both by these geometrical features and by the appearance of intramolecular charge transfer bands in the electronic spectra of 1(a–d).