Von multifunktionalen, siliziumorganischen Bausteinen zu Pinzetten-stabilisierten Silylkationen

Abstract

Starting with 1,3-Dihalogenebenzene new metalorganic compounds 2,6-dihalogene-1-dimethylsilylbenzenes (1a, 1b, 1c), 3-bromo-2-dimethylilyl-1-diphenylphosphinebenzene (4), 1-bromo-2-dimethylsilyl-1-diphenylphosphinochalcogenidebenzenes (4a, 4b), (3-bromo- 3-bromo-2-dimethylsilyl)phenyl)(methyl)diphenylphosphoniumiodide (4c), dimethylsilyl-1-tributylstannylbenzene(5), 2,3-bis(dimethylsilyl)-1-diphenylphosphinebenzene (6), 3,2,-bis(dimethylsilyl)-1-diphenylphosphine-3-diphenylphosphinechalcogenidbenzene (6a, 6b), 2-dimethylsilyl-1,3-bis(diphenylphosphine)benzene (7), 2-dimethylsilyl-1-diphenylphospine-3-diphenylphosphinechalcogenidebenzenes (7a, 7b), (2-(dimethylsilyl)-3-(diphenylphosphanyl)phenyl)(methal)diphenylphosphonium iodide (7c), 2-dimethylsilyl-1,3-bis(diphenylphosphinechalcogenide)benzenes (8a, 8b, 8c), (2-(dimethyllsilyl)-1,3-phenylene)bis(methyldiphenylphosphonium) diiodide (8d), 1,3-dihalogene-2-tributylstannylbenzenes (14a, 14b, 14c), bis(2,6-dihalogene-1-dimethylsilylbenzenes) (15a, 15b, 15c), 1,7-bis(diphenylphosphine)biphenylene (16), 1,7-bis(diphenylsulfidophosphine)biphenylene (17) were synthesized and characterized. This compounds were used as precursor for a variety of reactions, mainly for the preparation of new pentacoordinated silylcations 2-dimethylsilyl-1,3-diphenylphosphineoxido)phenyl tribromide (10), 2-dimethylsilyl-3-diphenylphosphin-1-diphenylsulfidophosphinepehnyl tetrakis(pentafluorophenyl)borate (11), 2-dimetrhylsilyl1,3-bis(diphenylphosphinesulfido)phenyl tetrakis(pentafluorophenyl)borate (12), 2-dimethylsilyl-3-diphenylphosphineoxido-1-diphenylphosphinesulfidophenyl tetrakis(pentafluorophenyl)borate (12a) and 2-dimethylsilyl-1,3-bis(diphenylphosphineselenido)phenyl tetrakis(pentafluorophenyl)borate (13).