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- W1998372378 abstract "The complexation of tetramethylethylenediamine (TMEDA), hexamethyltriethylenetetramine (HMtT) and tetramethyltetraazacyclotetradecane (TMTCT) with ion airs of 9-(n-propyl)fluorenyllithium (PFl−, Li+) and n-butyl-9-(n-propyl)fluorenylmagnesium (BuPFlMg) in cyclohexane was studied by optical spectroscopy. The results can be explained in terms of externally complexed tight ion pairs and ligand-separated ion pairs, the latter complexes being much less soluble. With HMTT and PFl−, Li+, the only complexes formed are (PFl−, Li+)2 HMTT (λm 357 nm) and PFl−, HMTT, Li+ (λm 383 nm). The reaction of PFl−, Li+, TMEDA with TMTCT to form the loose ion pair complex PFl−, TMTCT, Li+ has a rate constant in toluene of 250 M−1 sec−1. With the magnesium compound, the amines form only a loose ion pair complex, e.g., BuMg+, TMEDA, PFl− (λm 382 nm)." @default.
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- W1998372378 date "1981-02-01" @default.
- W1998372378 modified "2023-09-23" @default.
- W1998372378 title "Complexes of 9-propylfluorenyl ion pairs with tertiary polyamines in apolar solvents" @default.
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- W1998372378 doi "https://doi.org/10.1016/s0022-328x(00)81469-2" @default.
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