Stannane 14 was obtained through an initial chlorination of 12 (>99% yield), with further conversion (>95%) to the dichlorinated stannane 18 after a second treatment with chlorinating reagent. Both crude chlorinated products were washed with a minimal volume of hexane, recrystallized from a solution of DCM and hexane and recovered as white crystalline solids. Similar transformations were achieved with compounds 15 and 19 in good yields and purity with isolation as a yellow-coloured semi-solid and orange-coloured crystals, respectively. The dihydridos (22,23) were isolated as white coloured semi-solids and kept at low temperature (-20 C) and in the absence of light. Large upfield 119 Sn NMR chemical shifts for these species were observed, consistent with a pseudo-tetrahedral, rather than trigonal bipyramidal geometry around tin. Further structural identification of the chlorinated methoxy-containing compounds 14 and 18 (Figure : top right, and bottom left respectively) by single crystal X-ray analysis reveals significant hypercoordination between the methoxy substituent and tin centres, similar to that observed previously by Lebl et al.