2,4-bis(2',2,'6',6'-tetramethylpiperidino)-1-phosphonia-2-phosphato-3,4-dibora[1,1,0]bicyclobutane-tris(pentafluorophenyl)borate
iron pentacarbonyl
2,4-bis(2',2',6',6'-tetramethylpiperidino)-1,3,2,4-diphosphadiborabicyclo{1.1.0}-butan-bis(tetracarbonyleisen)
2,4-bis(2',2',6',6'-tetramethylpiperidino)-1,3,2,4-diphosphadiborabicyclo{1.1.0}butan-tetracarbonyleisen