Fig. 2 31P NMR spectra for 7b[OTf]2: experimental solution spectrum (exp.) in d3-MeCN at 202.46 MHz (25 uC, external H3PO4) and simulated solution
spectrum (sim.). 31P CP/MAS NMR spectrum, broad resonances indicated by Q are modeled as an AA9XX9 spin system (* spinning side bands, u
impurity).
8 N. Burford, T. S. Cameron, P. J. Ragogna, E. Ocando-Mavarez,
M. Gee, R. McDonald and R. E. Wasylishen, J. Am. Chem. Soc., 2001,
123, 7947–7948.
9 N. Burford, A. D. Phillips, H. A. Spinney, M. D. Lumsden, U. Werner-
Zwanziger, M. J. Ferguson and R. McDonald, J. Am. Chem. Soc.,
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dicationic charge in derivatives of 7 provides examples of
bifunctional phosphorus Lewis acceptors of type 4 and comple-
ments the previously reported dicationic complexes of a bifunc-
tional donor on two phosphorus acceptors, of type 3.4,10 In this
context, the new dications provide insight for the development of
extended systems towards cationic polymers.
10 N. Burford, H. A. Spinney, M. J. Ferguson and R. McDonald, Chem.
Commun., 2004, 2696–2697.
We thank J. C. Landry for preliminary experimental work, the
Natural Sciences and Engineering Research Council of Canada,
the Killam Foundation, the Canada Research Chairs Program and
the Alexander von Humboldt-Stiftung (J. J. W., Feodor Lynen
program) for funding.
11 N. Burford, C. A. Dyker, A. D. Phillips, H. A. Spinney, A. Decken,
R. McDonald, P. J. Ragogna and A. L. Rheingold, Inorg. Chem., 2004,
43, 7502–7507.
12 N. Burford, A. D. Phillips, H. A. Spinney, K. N. Robertson,
T. S. Cameron and R. McDonald, Inorg. Chem., 2003, 42, 4949–4954.
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