To increase the polarisation of the two pentalenide moieties further, we investigated the metalation of ( p MeOPh)2Ph2PnH2 (7H2) bearing more electron-donating aryl groups than tolyl or xylyl. Its deprotonation with an excess of LiNEt2 did not occur as quickly as with 3─6 but required several days to go to completion, presumably due to a higher pKA of the five-membered ring with the electrondonating p MeOPh groups. However, after seven days at room temperature Li2[( p MeOPh)2Ph2Pn]