Aryldimethylelement cations of the heavier group 14 elements. An essentially three-coordinate plumbylium ion

The kinetically stabilized group 14 cations [RindEMe2][B(C6F5)(4)] (E = Si, Sn, Pb) were prepared and fully characterized (R-ind = dispiro[fluorene-9,3 '-(1 ',1 ',7 ',7 '-tetramethyl-s-hydrindacen-4 '-yl)-5 ',9 ''-fluorene). The deshielded heteronuclear NMR chemical shifts (delta(Si-29) = 160.4, delta(Sn-119) = 619.9, delta(Pb-207) = 1549.5) are indicative of the low coordination numbers.

Automated summary

The kinetically stabilized group 14 cations [RindEMe2][B(C6F5)(4)] (E = Si, Sn, Pb) were successfully prepared and characterized. The deshielded heteronuclear NMR chemical shifts (δ(Si-29) = 160.4, δ(Sn-119) = 619.9, δ(Pb-207) = 1549.5) indicate low coordination numbers.