Abstract
Organobismuth chalcogenides of type [CH3OCH2CH2N(CH2C6H4)2Bi]2E [E = S (1), Se (2)], containing two butterfly-like tetrahydro-dibenzo[c,f][1,5]azabismocine heterocyclic frameworks, were prepared and their solution behavior was investigated by multinuclear NMR spectroscopy (1H, 13C and 77Se, as appropriate) and mass spectrometry. Crystals of [CH3OCH2CH2N(CH2C6H4)2BiO]2SeO (3) were serendipitously formed during the synthesis of compound 2. The molecular structure of 3 was determined by single-crystal X-ray diffraction and revealed, besides a strong transannular N→Bi interaction, an additional O‧‧‧Bi interaction involving the oxygen of the NCH2CH2OCH3 pendant arm from the organic fragment attached to the metal atom, thus resulting in a 12Bi5 hypercoordinate species.
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