Chapter 4 elements of group 4

Synthesis of an anionic tridentate phosphinoborate and its reaction chemistry with Sn(II)

“…That all three phosphines are capable of bonding to the metal is revealed by the solution 31 P{ 1 H} NMR spectrum of 2, which shows only a single broad peak, centered at d 25.1. Similar results are observed for anionic bidentate phosphine 19 and poly(pyrazolyl)borate 7 complexes of tin(ii) as well. With one coordination site of 2 occupied by chloride, the ligation of only two phosphines is consistent with the stereochemical influence exerted by the electron lone pair present on the tin(ii) center.…”