Structurally characterized terminal manganese(iv) oxo tris(alkoxide) complex† †Electronic supplementary information (ESI) available: Single crystal X-ray diffraction data; ESI-MS spectra and data: IR spectra; and magnetic data. CCDC 1829119–1829121. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8sc01164h