The Role of Bridging Ligands in Controlling Electronic and Magnetic Properties in Polynuclear Complexes

Accounts of Chemical Research

Volumn 31, Issue 12, 1998, Pages 842-851

  Mccleverty, Jon A ^a   Ward, Michael D ^a  

^a UNIVERSITY OF BRISTOL   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001545782     PISSN: 00014842     EISSN: None     Source Type: Journal    
DOI: 10.1021/ar970315s     Document Type: Article

References (57)

1. Ward, M. D. Metal - metal interactions in binuclear complexes exhibiting mixed-valency; molecular wires and switches. Chem. Soc. Rev. 1995, 121-134.
2. (a) Ward, M. D. Current developments in molecular wires. Chem. Ind. 1996, 568-573.
3. (b) Ward, M. D.; Current developments in molecular switches. Chem. Ind. 1997, 640-645.
4. (a) Kahn, O. Molecular Magnetism; VCH Publishers, Inc.: New York, 1993.
5. (b) Bushby, R. J.; Paillaud, J.-L. Molecular magnets. In Introduction to Molecular Electronics; Petty, M. C., Bryce, M. R., Bloor, D., Eds.; Edward Arnold: London, 1995, pp 72-91.
6. 3. Phys. Rev. 1955, 100, 564-573.
7. (3-λ). J. Phys. Chem. Solids 1958, 6, 287-297.
8. (c) Kanamori, J. Superexchange interaction and symmetry properties of electron oribtals. J. Phys. Chem. Solids 1959, 10, 87-98.
9. (d) Ginsberg, A. P. Magnetic exchange in transition-metal complexes, VI: aspects of exchange coupling in magnetic cluster complexes. Inorg. Chim. Acta Rev. 1971, 5, 45-68.
10. (a) Kahn, O. Magnetism of the heteropolymetallic systems. Struct. Bonding 1987, 68, 89-167.
11. (b) Gordon-Wylie, S. W.; Bominaar, E. L.; Collins, T. J.; Workman, J. M.; Claus, B. L.; Patterson, R. E.; Williams, S. A.; Conklin, B. J.; Yee, G. T.; Weintraub, S. T. Ligand design for securing ferromagnetic exchange coupling in multinuclear complexes. Chem. Eur. J. 1995, 1, 528-537.
12. 2] (L = Pyrimidine or Pyrazine). Angew. Chem., Int. Ed. Engl. 1998, 37, 135-138.
13. (a) Miller, J. S.; Epstein, A. J. Organic and organometallic molecular magnetic materials - designer magnets. Angew. Chem., Int. Ed. Engl. 1994, 33, 385-415.
14. (b) Iwamura, H. Approaches from super-high-spin molecules to organic ferromagnets. Pure Appl. Chem. 1993, 65, 57-64.
15. (c) Rajca, S. Organic diradicals and polyradicals: from spin coupling to magnetism, Chem. Rev. 1994, 94, 871-893.
16. (d) Rajca, S.; Rajca, A. Novel high-spin molecules: π-conjugated polyradical polyanions. Ferromagnetic spin coupling and electron localization. J. Am. Chem. Soc. 1995, 117, 9172-9179.
17. (e) Yoshizawa, K.; Hoffman, R. Potential linear-chain organic ferromagnets. Chem. Eur. J. 1995, 1, 403-413.
18. (f) Iwamura, H.; Koga, N. Studies of organic di-, oligo-and polyradicals by means of their bulk magnetic properties. Acc. Chem. Res. 1993, 26, 346-351.
19. (a) McWhinnie, S. L. W.; Jones, C. J.; McCleverty, J. A.; Collison, D.; Mabbs, F. E. Synthesis and characterization of 17-electron species of nitrosyl(tris-3,5-dimethylpyrazolylborato)molybdenum. Polyhedron 1992, 11, 2639-2643.
20. (b) Das, A.; Drane, A. S.; McCleverty, J. A. Alkoxy, amido and thiolato complexes of tris(3,5-dimethylpyrazolyl)borato(nitrosyl)-molybdenum fluoride, chloride and bromide. Polyhedron 1983, 2, 53-57.
21. (c) Charsley, S. M.; Jones, C. J.; McCleverty, J. A.; Neaves, B. D.; Reynolds, S. J.; Denti, G. Monometallic, homo-and heterobimetallic complexes based on redox-active tris(3,5-dimethylpyrazoly)borato molybdenum and tungsten nitrosyls. Part 7. Compounds containing strongly interacting redox centres derived from para-substituted anilines and phenols. J. Chem. Soc., Dalton Trans. 1988, 293-299.
22. Cleland, W. E., Jr.; Barhhart, K. M.; Yamanouchi, K.; Collison, D.; Mabbs, F. E.; Ortega, R. B.; Enemark, J. H. Syntheses, structures and spectroscopic properties of six-coordinate mononuclear oxo-molybdenum(V) complexes stabilized by the hydrotris (3,5-dimethyl-1-pyrazolyl)borate ligand. Inorg. Chem. 1987, 26, 1017-1025.
23. 3+ complexes: a photoelectron spectroscopy study. Inorg. Chem. 1997, 36, 5404-5405.
24. McWhinnie, S. L. W.; Jones, C. J.; McCleverty, J. A.; Collison, D.; Mabbs, F. E. EPR and electrochemical studies of bimetallic seventeen-electron molybdenum species exhibiting unusually large interactions across bipyridyl bridging ligands. J. Chem. Soc., Chem. Commun. 1990, 940-942.
25. Sutton, J. E.; Taube, H. Metal to metal interactions in weakly coupled mixed-valence complexes based on ruthenium ammines. Inorg. Chem. 1981, 20, 3125-3134.
26. Thomas, J. A.; Jones, C. J.; McCleverty, J. A.; Collison, D.; Mabbs, F. E.; Harding, C. J.; Hutchings, M. G. An EPR, magnetic and electrochemical study of electron-exchange and intermetallic interactions through polyene bridges. J. Chem. Soc., Chem. Commun. 1992, 1796-1798.
27. Wlodarczyk, A.; Doyle, G. A.; Maher, J. P.; McCleverty, J. A.; Ward, M. D.; Thomas, J. A.; Jones, C. J. Mixed-valency by oxidation and reduction: a molybdenum-based super-Creutz-Taube ion. Chem. Commun. 1997, 769-770.
28. Das, A.; Maher, J. P.; McCleverty, J. A.; Navas, J. A.; Ward, M. D. Metal-metal interactions across symmetrical bipyridyl bridging ligands in binuclear complexes containing two seventeen-electron molybdenum centres. J. Chem. Soc., Dalton Trans. 1993, 681-686.
29. Cargill Thompson, A. M. W.; Gatteschi, D.; McCleverty, J. A.; Navas, J. A.; Rentschler, E.; Ward, M. D. Effects of systematic variation in bridging ligand structure on the electrochemical and magnetic properties of a series of dinuclear molybdenum complexes. Inorg. Chem. 1996, 35, 2701-2703.
30. Hock, J.; Cargill Thompson, A. M. W.; McCleverty, J. A.; Ward, M. D. Some new di-pyridyl and diphenol bridging ligands containing oligothienyl spacers, and their dinuclear molybdenum complexes: electrochemical, spectroscopic and luminescence properties. J. Chem. Soc., Dalton Trans. 1996, 4257-4263.
31. Ung, V. A.; Cargill Thompson, A. M. W.; Bardwell, D. A.; Gatteschi, D.; Jeffery, J. C.; McCleverty, J. A.; Totti, F.; Ward, M. D. The roles of bridging ligand topology and conformation in controlling exchange interactions between paramagnetic molybdenum fragments in dinuclear and trinuclear complexes. Inorg. Chem. 1997, 36, 3447-3454.
32. Creutz, C.; Taube, H. Binuclear complexes of ruthenium ammines. J. Am. Chem. Soc. 1973, 95, 1086-1094.
33. Richardson, D. E.; Taube, H. Electronic interactions in mixed-valence molecules as mediated by organic bridging groups. J. Am. Chem. Soc. 1983, 105, 40-51.
34. Ung, V. A.; Bardwell, D. A.; Jeffery, J. C.; Maher, J. P.; McCleverty, J. A.; Ward, M. D.; Williamson, A. Dinuclear oxo-molybdenum(v) complexes with bisphenol bridging ligands: syntheses and structures, and electrochemical and EPR spectroscopic properties. Inorg. Chem. 1996, 35, 5290-5299.
35. Das, A.; Jeffery, J. C.; Maher, J. P.; McCleverty, J. A.; Schatz, E.; Ward, M. D.; Wollermann, G. Mono-and bi-nuclear molybdenum and tungsten complexes containing asymmetric bridging ligands: the effects of ligand conjugation and conformation on metal-metal interactions. Inorg. Chem. 1993, 32, 2145-2155.
36. (a) Reitz, D. C.; Weissman, S. I. Spin exchange in biradicals. J. Chem. Phys. 1960, 33, 700-704.
37. (b) Brière, R.; Dupeyre, R.-M.; Lemaire, H.; Morat, C.; Rassat, A.; Rey, P. Nitroxydes XVII: biradicaux stables du type nitroxyde. Bull. Soc. Chim. Fr. 1965, 11, 3290-3297.
38. Amoroso, A. J.; Cargill Thompson, A. M. W.; Maher, J. P.; McCleverty, J. A.; Ward, M. D. Di-, tri-and tetranucleating pyridyl ligands which facilitate multi-centre magnetic exchange between paramagnetic molybdenum centres. Inorg. Chem. 1995, 34, 4828-4835.
39. (a) Parker, C. C.; Reeder, R. R.; Richards, L. B.; Rieger, P. H. A novel vanadyl pyrophosphate trimer. J. Am. Chem. Soc. 1970, 92, 5230-5231.
40. (b) Hasegawa, A. Electron spin resonance of a trinuclear vanadyl pyrophosphate complex. J. Chem. Phys. 1971, 55, 3101-3104.
41. (a) Siedle, A. R.; Padula, F.; Baranowski, J.; Goldstein, C.; De Angelo. M.; Kokoszka, G. P.; Azevedo, L.; Venturini, E. L. Transmission of magnetic interactions in a molecular metal oxide cluster. J. Am. Chem. Soc. 1983, 105, 7447-7448.
42. (b) Kokoszka, G. P.; Padula, F.; Goldstein, C.; Venturini, E. L.; Azevedo, L.; Siedle, A. R. Magnetic interactions in a copper(II) trimer encapsulated in a molecular metal oxide cluster. Inorg. Chem. 1988, 27, 59-62.
43. 5-methylcyclopentadienyl)titanium(III) complexes bridged by the dianion of 2,4-dithiopyrimidine and related dianions: magnetic and EPR properties. Inorg. Chem. 1979, 18, 3074-3080.
44. Wlodarczyk, A.; Maher, J. P.; McCleverty, J. A.; Ward, M. D. Dinuclear molybdenum complexes containing benzene-diamido and dianilido bridges: mixed-valence behaviour and electrochemical interactions. J. Chem. Soc., Dalton Trans. 1997, 3287-3298.
45. 4-bridged mixed-valence iron(II)-iron(III) complex delocalized on the infra-red timescale. J. Chem. Soc., Chem. Commun. 1993, 357-359.
46. 4-chain conducts charge between two chiral and configurationally stable rhenium termini. Organometallics 1993, 12, 3802-3804.
47. (a) Etzenhouser, B. A.; Cavanaugh, M. D.; Sprugeon, H. N.; Sponsler, M. B. Mixed-valence diiron complexes with butadienyl bridges. J. Am. Chem. Soc. 1994, 116, 2221-2222.
48. 0 ions with controlled torsion of the biphenyl bridge. Inorg. Chem. 1994, 33, 373-381.
49. 6) organometallic analogue of the Creutz-Taube ion. J. Chem. Soc., Chem. Commun. 1993, 1868-1869.
50. Longuet-Higgins, J. C. Some studies in molecular orbital theory (I). Resonance structures and molecular orbitals in unsaturated hydrocarbons. J. Chem. Phys. 1950, 18, 265-274.
51. (a) Karafiloglou, P. Through-bond interaction of two radical centres: analysis of the spin-polarization and related interactions in linear π-diradicals. J. Chem. Phys. 1985, 82, 3728-3740.
52. (b) Ovchinnikov, A. A. Multiplicity of the ground state of large alternant organic molecules with conjugated bonds. Theor. Chim. Acta 1978, 47, 297-304.
53. 1H ENDOR and a UHF Hubbard calculation. Chem. Phys. Lett. 1990, 173, 265-270.
54. (b) Takui, T.; Kita, S.; Ichikawa, S.; Teki, Y.; Kinoshita, T.; Itoh, K. Spin distribution of organic high-spin molecules as studied by ENDOR/TRIPLE. Mol. Cryst. Liq. Cryst. 1989, 176, 67-76.
55. (a) Rajca, A.; Rajca, S. Intramolecular antiferromagnetic vs. ferromagnetic spin-coupling through the biphenyl unit. J. Am. Chem. Soc. 1996, 118, 8121-8126.
56. (b) Minato, M.; Lahti, P. M.; van Willigen, H. Models for intramolecular exchange in organic π-conjugated open-shell systems: a comparison of three non-Kekulé biphenyldinitrenes. J. Am. Chem. Soc. 1993, 115, 4532-4539.
57. Ung, V. A.; Couchman, S. M.; Jeffery, J. C.; McCleverty, J. A.; Ward, M. D.; Totti, F., Gatteschi, D. Electrochemical and magnetic exchange interactions in trinuclear chain complexes containing oxo-Mo(V) fragments as a function of the topology of the bridging ligand. Inorg. Chem., submitted for publication.