Metal-Ligand Coupling Elements and Antiferromagnetic Superexchange in Ruthenium Dimers

Inorganic Chemistry

Volumn 37, Issue 8, 1998, Pages 1880-1885

  Naklicki, Mark L ^a   White, Christopher A ^a   Plante, Lisa L ^a   Evans, Christopher E B ^a   Crutchley, Robert J ^a  

^a CARLETON UNIVERSITY   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000797949     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic970728p     Document Type: Article

References (69)

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41. s) shows that X in acetonitrile is a good average. See: Creutz, C. Prog. Inorg. Chem. 1983, 30, 1.
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43. DCT are expected to follow the same minor variation in energy as that seen for the LMCT bands in Tables 1-5.
44. The rationale for this method of estimating U has been published: Didziuslis, S. V.; Cohen, S. L.; Gerwirth, A. A.; Solomon, E. I. J. Am. Chem. Soc. 1988, 110, 250. See also ref 7.
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48. Equation 9 is derived from the substitution of the Van Vleck expression for magnetic susceptibility into eq 7.
49. It is also possible to determine -2J from temperature-dependent chemical shift data. See: Cotton, F. A.; Eglin, J. L.; Hong, B.; James, C. A. J. Am. Chem. Soc. 1992, 114, 4915. The solvents used in this study have a limited temperature range and are not optimal for these measurements. In addition, the donor-acceptor interaction between the solvent and animine protons is expected to be temperature dependent.
50. 1/2.
51. LaChance-Galang, K. J.; Doan, P. E.; Clarke, M. J.; Rao, U.; Yamano, A.; Hoffman, B. M. J. Am. Chem. Soc. 1995, 117, 3529.
52. No EPR signal was observed for the complexes in solution at room temperature or as glasses at 77 K.
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56. Aquino, M. A. S.; Crutchley, R. J.; Lee, F. L.; Gabe, E. J.; Bensimon, C. Acta Crystallogr. 1993, C49, 1543.
57. 4+ showed the dicyd bridging ligand to be planar but with eyanamides in the syn conformation: Rezvani, A. R.; Bensimon, C.; Cromp, B.; Reber, C.; Greedan, J. E.; Kondratiev, V. V.; Crutchley, R. J. Inorg. Chem. 1997, 36, 3322. A crystal structure of the pentaammine analogue in ref 14 showed a planar bridging ligand with cyanamides in the anti conformation.
58. Aquino, M. A. S.; Crutchley, R. J.; Lee, F. L.; Gabe, E. J.; Bensimon, C. Acta Crystallogr. 1993, C49, 1543.
59. Recent high-temperature magnetic susceptibility measurements have raised our lower limit for -J from that reported in ref 14.
60. Tripos Sybyl software.
61. F is essentially an electron-pairing term which should remain constant for a series of similar complexes
62. est is calculated by using eq 9 for the experimental range of g = 2.0-2.4 for Ru(III) complexes.
63. dπ was calculated from MLCT oscillator strengths. See ref 12.
64. Naklicki, M. L.; White, C. A.; Krondratiev, V. V.; Crutchley, R. J. Inorg. Chim. Acta 1996, 242, 63.
65. F is small, it could well be canceled by second-order antiferromagnetic contributions. See ref 9a.
66. F is small, it could well be canceled by second-order antiferromagnetic contributions. See ref 9a.
67. The ammine becomes more "amide-like" and contributes π electron density to Ru(III).
68. Naklicki, M. L.; Crutchley, R. J. Inorg. Chem. 1989, 28, 4226.
69. 2 gave a planar conformer with anti cyanamide groups.