Synthesis, structural, and magnetic characterization of linear and bent geometry cobalt(II) and nickel(II) amido complexes: evidence of very large spin-orbit coupling effects in rigorously linear coordinated Co2+

Inorganic Chemistry
Aimee M BryanPhilip P Power

Abstract

The complexes M(II){N(H)Ar(Pr(i)(6))}(2) (M = Co, 1 or Ni, 2; Ar(Pr(i)(6)) = C(6)H(3)-2,6(C(6)H(2)-2,4,6-Pr(i)(3))(2)), which have rigorously linear, N-M-N = 180°, metal coordination, and M(II){N(H)Ar(Me(6))}(2) (M = Co, 3 or Ni, 4; Ar(Me(6)) = C(6)H(3)-2,6(C(6)H(2)-2,4,6-Me(3))(2)), which have bent, N-Co-N = 144.1(4)°, and N-Ni-N = 154.60(14)°, metal coordination, were synthesized and characterized to study the effects of the metal coordination geometries on their magnetic properties. The magnetometry studies show that the linear cobalt(II) species 1 has a very high ambient temperature moment of about 6.2 μ(B) (cf. spin only value = 3.87 μ(B)) whereas the bent cobalt species 3 had a lower μ(B) value of about 4.7 μ(B). In contrast, both the linear and the bent nickel complexes 2 and 4 have magnetic moments near 3.0 μ(B) at ambient temperatures, which is close to the spin only value of 2.83 μ(B). The studies suggest that in the linear cobalt species 1 there is a very strong enhanced spin orbital coupling which leads to magnetic moments that broach the free ion value of 6.63 μ(B) probably as a result of the relatively weak ligand field and its rigorously linear coordination. For the linear nickel species 2, however, the expected ...Continue Reading

References

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Citations

May 9, 2014·Science·Ileana G RauHarald Brune
Dec 13, 2016·Journal of the American Chemical Society·Xiao-Nan YaoSong Gao
Jul 5, 2017·Chemical Society Reviews·Chun-Yi Lin, Philip P Power
May 27, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Nicholas F ChiltonPhilip P Power
Aug 3, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Yinghua ShiChunming Cui
Dec 21, 2012·Angewandte Chemie·Eyal SpierIve Hermans
Jun 24, 2014·Angewandte Chemie·Gaël UngJonas C Peters
Sep 4, 2015·Angewandte Chemie·Michelle FaustPhilip P Power
Jun 14, 2012·Chemical Communications : Chem Comm·Michael I Lipschutz, T Don Tilley
Jan 6, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Andreas A DanopoulosGilles Frison
Jul 29, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Ruth WellerC Gunnar Werncke
Jul 26, 2013·Organic Letters·Chiharu SuzukiMasahiro Miura
Jun 21, 2013·Journal of the American Chemical Society·Jessica N BoyntonPhilip P Power
Nov 12, 2019·Inorganic Chemistry·Andrew W CookTrevor W Hayton
Jul 9, 2016·Inorganic Chemistry·Leland B GeeLars Lauterbach
May 1, 2015·Journal of the American Chemical Society·Michael I LipschutzT Don Tilley
Oct 13, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Min PengTai-Chu Lau

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