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The structures of (μ-5,15-diaza-8,12-dithianonadeca-3,16-diene-2,18-dione-O,O′)bis[halotris(p-tolyl)tin] {halo is bromo, [Sn2Br2(C7H7)6(C17H30N2O2S2)], iodo, [Sn2I2(C7H7)6(C17H30N2O2S2)], and chloro} have been determined. The three compounds are isostructural, but the chlorine-containing structure is imprecise and its structure data are not reported. Of the six potential coordination sites on the bridging dithianonane ligand, only the two carbonyl O atoms are bonded to Sn atoms [Sn—O = 2.30 (1)–2.35 (1) Å for the bromine and iodine compounds]. The carbonyl O atoms also interact with amine N atoms through N—H...O hydrogen bonds [N—O = 2.62 (2)–2.66 (1) Å]. The direction of greatest expansion [Δc (space group Pna21) = 0.598 (3) Å at 296 K when Br is changed to I] is nearly perpendicular [76 (1)–88 (1)°] to the tin–halogen bonds.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, 1, 2

fcf

Structure factor file (CIF format)
Contains datablock 1

fcf

Structure factor file (CIF format)
Contains datablock 2

CCDC references: 130573; 130574

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