Lewis-base adducts of main group metal(i) compounds. XI: Di-μ-iodo-bis(N, N, N′, N″, N″ -pentamethyl-diethylenetriamine-N, N′, N″-sodium)

The synthesis and structural characterization of the 1:1 adduct of sodium(I) iodide and N, N, N′, N″, N″-pentamethyldiethylenetriamine (pmdeta), a novel coordination complex of sodium(I), is recorded. Single-crystal X-ray structure determination shows the compound to be a μ,μ′-diiodo-bridged dimer, with the tridentate base making up the five-coordinate environment of sodium: [(pmdeta)NaI₂Na(pmdeta)]. Crystals are triclinic, P1, a 10.113(2), b 9.470(2), c 8.793(4) Å, α 114.48(2), β 92.09(2), γ 96.65(1)°, Z=1 dimer; R was 0.037 for 1837 'observed' reflections.