Formation of “A-frame” dirhenium(I) hexacarbonyl complexes by trans-1,2-bis(diphenylphosphino)ethylene and bis(bidentate) ligands

Kee, Chee Leong; Zhou, Feng; Su, Haibin; Yan, Yaw Kai

doi:10.1016/j.jorganchem.2015.04.046

Cited by 7 publications

(5 citation statements)

References 28 publications

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“…The toxa ligand in complex 1 is coordinated in a trans form. Several µ-toxa and µ-substituted-toxa dinuclear structures have been reported [10,13,16,[22][23][24]. The difference Fourier map of complex 1 revealed the presence of one proton in each N atom; therefore, deprotonation of dithiooxamide resulted in the loss of one proton from each N atom.…”

Section: Structure Of µ-Toxa Polynuclear Ni Complexesmentioning

confidence: 99%

“…Bridging toxa ligand is also surveyed by bond distance. The CCDC database shows that the N-C, S-C, and C-C bond lengths of µ-toxa in polynuclear complexes are 1.22 [17]-1.48 [12], 1.33 [17]−1.80 [14], and 1.43 [16]−1.58 [9] Å, respectively, with respective median values of 1.29 [14,28], 1.72 [29,30], and 1.50 [15,30] Å. Therefore, the bond lengths of the toxa ligand in the complexes prepared in this study fall within the range of those previously reported for polynuclear complexes.…”

Section: Structure Of µ-Toxa Polynuclear Ni Complexesmentioning

confidence: 99%

“…For example, a search in the CCDC database (updated in November 2022) [8] results in more than 1000 polynuclear complexes bearing oxalate as the bridging ligand, whereas the number of hits for polynuclear complexes with bridging oxamidate and substituted oxamidate ligands, dithiooxamidate and substituted dithiooxamidate ligands is 500 and 30, respectively. Only 12 polynuclear complexes with bridging unsubstituted dithiooxamidate ligands are reported [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Dithiooxamidate-Bridged Polynuclear Ni Complexes

Hamaguchi,

Kuraoka,

Yamamoto

et al. 2023

Chemistry

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Mixed-valence complexes contain two metals with different formal oxidation numbers and, therefore, show mixed properties that are influenced by the electronic coupling between the two metals, which is, in turn, regulated by a bridging ligand. This is an attractive point for many researchers. Oxalate is widely used as a bridging ligand for preparing polynuclear complexes. More than 1000 complexes have been reported until now. However, dithiooxamidate, which is an oxalate analog, is less popular as a bridging ligand. Here, a new dithiooxamidate-bridged Ni-diphosphine dinuclear complex with the formula [(μ2-toxa){Ni(dppe)}2](BF4)2 (toxa = dithiooxamidate; dppe = 1,2-bis(diphenylphosphino)ethane) was prepared and characterized via single-crystal X-ray diffraction. When using 1,3-bis(diphenylphosphino)propane (dppp) instead of dppe, dinuclear, trinuclear, and tetranuclear complexes were obtained, i.e., [(μ2-toxa){Ni(dppp)}2](BF4)2, [{μ2-Ni(toxa)2}{Ni(dppp)}2](BF4)2, and [{μ3-Ni(toxa)3}{Ni(dppp)}3](BF4)2, respectively. Bidentate toxa ligands in dinuclear complexes coordinate each Ni atom as κ(S,N). However, the trinuclear and the tetranuclear complexes have the toxa ligands with κ(N,N) and κ(S,S) coordination. The [(μ2-toxa){Ni(dppe)}2](BF4)2 complex undergoes four reversible redox processes, whose analysis via a controlled-potential absorption spectrum reveals the presence of a Ni(II)-Ni(I) mixed-valence state at ∆E1/2 = 0.22 V with a comproportionation constant of 6.1 × 103.

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Section: Structure Of µ-Toxa Polynuclear Ni Complexesmentioning

confidence: 99%

Section: Structure Of µ-Toxa Polynuclear Ni Complexesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Dithiooxamidate-Bridged Polynuclear Ni Complexes

Hamaguchi,

Kuraoka,

Yamamoto

et al. 2023

Chemistry

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“…[15,[27][28][29][30][31] For the construction of such dirhenium metallacycles, bis(chelating) organic clips are usually utilized in combination with flexible dipyridyl linkers. [27,30] Owing to their efficacy in different fields such as luminescent sensors, imaging, and photocatalytic CO 2 reduction, Re I -based complexes continue to attract considerable interest for various modern applications.…”

Section: Introductionmentioning

confidence: 99%

“…Even though a fair number of transition‐metal‐based M 2 L 2 ‐type dinuclear flexible metallacycles have been developed,19–26 heteroligand‐bridged homodimetallic systems containing fac ‐Re(CO) 3 corners are scarce 15,27–31. For the construction of such dirhenium metallacycles, bis(chelating) organic clips are usually utilized in combination with flexible dipyridyl linkers 27,30.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly of Oxamidato‐Chelated Re^I‐ and Mn^I‐Based Flexible Dinuclear Horse‐Stirrup‐Like Metallacycles

et al. 2015

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Synthesis and Characterization of Aminoquinonato Bridged Re(I)‐Based Amide Functionalized Dinuclear Metallastirrups and Tetranuclear Lemniscate Metallacycles

et al. 2018

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Herein, we describe a multicomponent self‐assembly approach that has the prospect of furnishing functionalized di‐ and tetranuclear metallacyclic architectures with a very less level of constitutional control using semi‐rigid ligands. The methodology relies on the coordination preference of the metal and the directionality of the ligands. Self‐assembly of Re2(CO)10, aminoquinone ligands (H2L=2,5‐bis(n‐butylamino)‐1,4‐benzoquinone (bbbq), 2,5‐bis(n‐octylamino)‐1,4‐benzoquinone (bobq) and 2,5‐bis(phenethylamino)‐1,4‐benzoquinone (bpbq)) and ditopic pyridyl ligands (N‐L′‐N=bis(4‐pyridinecarboxamide)‐1,2‐ethane (bpce), N,N′‐(1,2‐phenylene)diisonicotinamide (pdia) and N,N′‐bis(4‐pyridylformamide)‐1,4‐benzene (bpfb)) in equimolar ratio afforded amide functionalized metallacyclophanes of 1–9 (Scheme ). Compounds 1–9 have been characterized by elemental analysis, IR, NMR, UV/Vis absorption and ESI‐mass spectroscopic techniques. Molecular structures of 1, 3 and 7 were ascertained by single‐crystal X‐ray diffraction methods.

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Formation of “A-frame” dirhenium(I) hexacarbonyl complexes by trans-1,2-bis(diphenylphosphino)ethylene and bis(bidentate) ligands

Cited by 7 publications

References 28 publications

Synthesis and Characterization of Dithiooxamidate-Bridged Polynuclear Ni Complexes

Synthesis and Characterization of Dithiooxamidate-Bridged Polynuclear Ni Complexes

Self‐Assembly of Oxamidato‐Chelated Re^I‐ and Mn^I‐Based Flexible Dinuclear Horse‐Stirrup‐Like Metallacycles

Synthesis and Characterization of Aminoquinonato Bridged Re(I)‐Based Amide Functionalized Dinuclear Metallastirrups and Tetranuclear Lemniscate Metallacycles

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Formation of “A-frame” dirhenium(I) hexacarbonyl complexes by trans-1,2-bis(diphenylphosphino)ethylene and bis(bidentate) ligands

Cited by 7 publications

References 28 publications

Synthesis and Characterization of Dithiooxamidate-Bridged Polynuclear Ni Complexes

Synthesis and Characterization of Dithiooxamidate-Bridged Polynuclear Ni Complexes

Self‐Assembly of Oxamidato‐Chelated ReI‐ and MnI‐Based Flexible Dinuclear Horse‐Stirrup‐Like Metallacycles

Synthesis and Characterization of Aminoquinonato Bridged Re(I)‐Based Amide Functionalized Dinuclear Metallastirrups and Tetranuclear Lemniscate Metallacycles

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Self‐Assembly of Oxamidato‐Chelated Re^I‐ and Mn^I‐Based Flexible Dinuclear Horse‐Stirrup‐Like Metallacycles