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Volumn 11, Issue 11, 1972, Pages 2652-2668

Three-Dimensional Macrocyclic Encapsulation Reactions. III.1,2 Geometrical and Electronic Features of Tris(diimine) Complexes of Trigonal-Prismatic, Antiprismatic, and Intermediate Stereochemistry

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EID: 33947091671     PISSN: 00201669     EISSN: 1520510X     Source Type: Journal    
DOI: 10.1021/ic50117a019     Document Type: Article
Times cited : (129)

References (90)
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    • NATO Postdoctoral Fellow, 1970-1971.
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    • For a recent study of [M((py)3tame)]2 +, s + complexes see
    • For a recent study of [M((py)3tame)]2 +, s + complexes see S. O. Waridiga, J. E. Sarneski, and F. L. Urbach, Inorg. Chem., 11, 1349 (1972).
    • (1972) Inorg. Chem. , vol.11 , pp. 1349
    • Waridiga, S.O.1    Sarneski, J.E.2    Urbach, F.L.3
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    • private communication;
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    • private communication.
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    • In a series of alkali metal cryptate complexes the twist angles increase in the order, The structures are intermediate between a bicapped TP and bicapped TAP. However, the M-O distances are not necessarily optimal due to the size of the OeN2 cage
    • In a series of alkali metal cryptate complexes the twist angles increase in the order B. Metz, D. Moras, and R. Weiss, Chem. Commun., 444 (1971). The structures are intermediate between a bicapped TP and bicapped TAP. However, the M-O distances are not necessarily optimal due to the size of the OeN2 cage.
    • (1971) Chem. Commun. , pp. 444
    • Metz, B.1    Moras, D.2    Weiss, R.3
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    • The data for this complex are in close agreement with the spectral results for [Ni(N(py)i)2](C10)2
    • The data for this complex are in close agreement with the spectral results for [Ni(N(py)i)2](C10)2: G. C. Kulasingam, J. C. Lancaster, W. R. McWhinnie, and J. B. Watts, Spectrochim. Acta, Part A, 26, 835 (1970);
    • (1970) Spectrochim. Acta , vol.26 , pp. 835
    • Kulasingam, G.C.1    Lancaster, J.C.2    McWhinnie, W.R.3    Watts, J.B.4
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    • This statement refers only to the series oí complexes under consideration. Other Ni-Ns TAP complexes with diimine-type ligands can have larger extinction coefficients. As one example, bis(2, 6-diacetylpyridyl∼ dioximo)nickel(II) has e ∼30 for its octahedral vj band
    • This statement refers only to the series oí complexes under consideration. Other Ni-Ns TAP complexes with diimine-type ligands can have larger extinction coefficients. As one example, bis(2, 6-diacetylpyridyl∼ dioximo)nickel(II) has e ∼30 for its octahedral vj band: E. I. Baucom and R. S. Drago, J. Amer. Chem. Soc., 93, 6469 (1971).
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    • Baucom, E.I.1    Drago, R.S.2
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    • Electrolysis at -0.5 V vs. see (cf. Table V) caused a marked increase in the intensities of these features. Spectral measurement of a solution subjected to prolonged reductive electrolysis indicated that the sample whose spectrum is shown in Figure 7 contained ca. 0.6% of the Co(I) complex. Electrochemical oxidation failed to remove completely this material. Its presence in all samples of the Co(II) salt which we have prepared led to inconclusive results in single-crystal polarized spectral measurements. Additional experiments using acetonitrile solutions indicated that the Co (I) complex could also be generated photolytically, as appears to be the case for [Co(bipy)3]2+.40 The shoulder at ∼16, 000 cm”1 in the spectrum of [Co-(bipy)a]2 + in Figure 9 and in that reported earlier40 coincides with the 16, 400-cm”1 band of [Co(bipy)g] +. An additional band of the latter at 7200 cm-1 was not detected, however. Bands suspected to be due to Co(I) impurities in other complexes are so designated in Figures 7 and 9 and in Table III.
    • Electrolysis at -0.5 V vs. see (cf. Table V) caused a marked increase in the intensities of these features. Spectral measurement of a solution subjected to prolonged reductive electrolysis indicated that the sample whose spectrum is shown in Figure 7 contained ca. 0.6% of the Co(I) complex. Electrochemical oxidation failed to remove completely this material. Its presence in all samples of the Co(II) salt which we have prepared led to inconclusive results in single-crystal polarized spectral measurements. Additional experiments using acetonitrile solutions indicated that the Co (I) complex could also be generated photolytically, as appears to be the case for [Co(bipy)3]2+.40 The shoulder at ∼16, 000 cm”1 in the spectrum of [Co-(bipy)a]2 + in Figure 9 and in that reported earlier40 coincides with the 16, 400-cm”1 band of [Co(bipy)g] + (Y. Kaizu, Y. Tórii, and H. Kobayashi, Bull. Chem. Soc. Jap., 43, 3296 (1970)). An additional band of the latter at 7200 cm-1 was not detected, however. Bands suspected to be due to Co(I) impurities in other complexes are so designated in Figures 7 and 9 and in Table III.
    • (1970) Bull. Chem. Soc. Jap. , vol.43 , pp. 3296
    • Kaizu, Y.1    Tórii, Y.2    Kobayashi, H.3
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    • Differences in solvent between this work and ours produce small changes in line widths and shifts. The 6, 6'-H signal could not be located with the concentrations employed in the present study.
    • M. Wicholas and R. S. Drago, J. Amer. Chem. Soc., 90, 6946 (1968). Differences in solvent between this work and ours produce small changes in line widths and shifts. The 6, 6'-H signal could not be located with the concentrations employed in the present study.
    • (1968) J. Amer. Chem. Soc. , vol.90 , pp. 6946
    • Wicholas, M.1    Drago, R.S.2
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    • results to be published.
    • W. M. Reiff, results to be published.
    • Reiff, W.M.1


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