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Konarev DV, Kuzmin AV, Batov MS, Khasanov SS, Otsuka A, Yamochi H, Kitagawa H, Lyubovskaya RN. {CpFe II(CO) 2Sn II(Macrocycle •3-)} Radicals with Intrinsic Charge Transfer from CpFe(CO) 2 to Macrocycles (Cp: Cp or Cp*); Effective Magnetic Coupling between Radical Trianionic Macrocycles •3. ACS OMEGA 2018; 3:14875-14888. [PMID: 31458154 PMCID: PMC6644027 DOI: 10.1021/acsomega.8b02221] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 10/22/2018] [Indexed: 06/10/2023]
Abstract
Neutral {CpFeII(CO)2[SnII(Pc•3-)]} {Cp is cyclopentadienyl (1, 2) or Cp* is pentamethylcyclopentadienyl (3); Pc: phthalocyanine}, {Cp*FeII(CO)2[SnII(Nc•3-)]} (4, Nc: naphthalocyanine), and {CpFeII(CO)2[SnII(TPP•3-)]} (5, TPP: tetraphenylporphyrin) complexes in which CpFeII(CO)2 fragments (Cp: Cp or Cp*) are coordinated to SnII(macrocycle•3-) have been obtained. The product complexes were obtained at the reaction of charge transfer from CpFeI(CO)2 (Cp: Cp or Cp*) to [SnII(macrocycle2-)] to form the diamagnetic FeII and paramagnetic radical trianionic macrocycles. As a result, these formally neutral complexes contain S = 1/2 spins delocalized over the macrocycles. This provides alternation of the C-Nimine or C-Cmeso bonds in the macrocycles, the appearance of new bands in the near-infrared spectra of the complexes, and blue shift of both Soret and Q-bands. The {CpFeII(CO)2SnII(macrocycle•3-)} units (Cp: Cp or Cp*, macrocycle: Pc or Nc) form closely packed π-stacking dimers in 1 and 3 or one-dimensional chains in 2 and 4 with effective π-π interaction between the macrocycles. Such packing allows strong antiferromagnetic coupling between S = 1/2 spins. Magnetic interaction can be described well by the Heisenberg model for the isolated dimers in 1 and 3 with exchange interaction J/k B = -78 and -85 K, respectively. Magnetic behavior of 2 and 4 is described well by the model that includes contributions from an antiferromagnetically coupled S = 1/2 dimer (J intra) and a Heisenberg S = 1/2 chain with alternating antiferromagnetic spin exchange between the neighbors (J inter). Compound 2 demonstrates large intradimer interaction of J intra/k B = -54 K and essentially weaker interdimer exchange interactions of J inter/k B = -6 K, whereas compound 4 shows strong magnetic coupling of spins within the dimers (J intra/k B = -170 K) as well as between the dimers (J inter/k B = -40 K). Compound {CpFeII(CO)2[SnII(TPP•3-)]} (5) shows no π-π interactions between the porphyrin macrocycles, and magnetic coupling is weak in this case (Weiss temperature is -5 K). Preparation of a similar complex with indium(III) chloride phthalocyanine yields {CpFe(CO)2[In(Pc2-)]} (6). In this complex, indium(III) atoms are reduced instead of the phthalocyanine macrocycles that explains electron paramagnetic resonance silence of 6 in the 4-295 K range.
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Affiliation(s)
- Dmitri V. Konarev
- Institute
of Problems of Chemical Physics RAS, Chernogolovka, Moscow Region 142432, Russia
| | - Alexey V. Kuzmin
- Institute
of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia
| | - Mikhail S. Batov
- Institute
of Problems of Chemical Physics RAS, Chernogolovka, Moscow Region 142432, Russia
- Lomonosov
Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | - Salavat S. Khasanov
- Institute
of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia
| | - Akihiro Otsuka
- Division
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
- Research
Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideki Yamochi
- Division
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
- Research
Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroshi Kitagawa
- Division
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Rimma N. Lyubovskaya
- Institute
of Problems of Chemical Physics RAS, Chernogolovka, Moscow Region 142432, Russia
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Morán M, Cuadrado I, Pineda L, Masaguer JR, Losada J. Propyltrimethoxysilane-thiolate iron and nickel complexes: Synthesis, characterization and electrochemical behaviour. Inorganica Chim Acta 1990. [DOI: 10.1016/s0020-1693(00)82044-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bergamini P, Sostero S, Traverso O. Electron transfer reactions of bis[dicarbonyl(pentamethylcyclopentadienyl)iron] with organic compounds. Inorganica Chim Acta 1987. [DOI: 10.1016/s0020-1693(00)88091-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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