[2,3-Di(2-pyridyl)pyrazine-N1,N2']bis(triphenylphosphine)copper(I) nitrate ethanol solvate

Brooks, K. T.; Finnen, D. C.; Kirchhoff, Jon R.; Pinkerton, A. A.

doi:10.1107/s0108270194007080

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…The two main aims of these studies are the exploration of their versatility as ligands in designing extended arrays of metal ions and the characterization of their ability to mediate significant magnetic interactions between the paramagnetic centers that they bridge and which are separated by more than 6 Å. The structural information concerning dpp-containing complexes shows that this molecule can adopt terminal bidentate ,, and bridging bidentate/monodentate , and bis-bidentate 2,3,5,14-16 coordination modes. The largest magnetic coupling across bridging ddp is −1.38 cm -1 in the copper(II) chain [Cu(dpp)(H 2 O) 2 ] n (BF 4 ) 2 n ·2 n H 2 O …”

Section: Introductionmentioning

confidence: 99%

Crystal Structures and Magnetic Properties of 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (tppz)-Containing Copper(II) Complexes

et al. 2003

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Four new copper(II) complexes of formula [Cu(2)(tppz)(dca)(3)(H(2)O)].dca.3H(2)O (1), [Cu(5)(tppz)(N(3))(10)](n)() (2), [[Cu(2)(tppz)(N(3))(2)][Cu(2)(N(3))(6)]](n)() (3), and [Cu(tppz)(N(3))(2)].0.33H(2)O (4) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and dca = dicyanamide anion] have been synthesized and structurally characterized by X-ray diffraction methods. The structure of complex 1 is made up of dinuclear tppz-bridged [Cu(2)(tppz)(dca)(3)(H(2)O)](+) cations, uncoordinated dca anions, and crystallization water molecules. The copper-copper separation across bis-terdentate tppz is 6.5318(11) A. Complex 2 is a sheetlike polymer whose asymmetric unit contains five crystallographically independent copper(II) ions. These units are building blocks in double chains in which the central part consists of a zigzag string of copper atoms bridged by double end-on azido bridges, and the outer parts are formed by dinuclear tppz-bridged entities which are bound to the central part through single end-on azido bridges. The chains are furthermore connected through weak, double out-of-plane end-on azido bridges, yielding a sheet structure. The intrachain copper-copper separations in 2 are 6.5610(6) A across bis-terdentate tppz, 3.7174(5) and 3.8477(5) A across single end-on azido bridges, and from 3.0955(5) to 3.2047(7) A across double end-on azido bridges. The double dca bridge linking the chains into sheets yields a copper-copper separation of 3.5984(7) A. The structure of 3 consists of centrosymmetric [Cu(2)(tppz)(N(3))(2)](2+) and [Cu(2)(N(3))(6)](2)(-) units which are linked through axial Cu.N(azido) (single end-on and double end-to-end coordination modes) type interactions to afford a neutral two-dimensional network. The copper-copper separations within the cation and anion are is 6.5579(5) A (across the bis-terdentate tppz ligand) and 3.1034(6) A (across the double end-on azido bridges), whereas those between the units are 3.6652(4) A (through the single end-on azido group) and 5.3508(4) A (through the double end-to-end azido bridges). The structure of complex 4 is built of neutral [Cu(tppz)(N(3))(2)] mononuclear units and uncoordinated water molecules. The mononuclear units are grouped by pairs to give a rather short copper-copper separation of 3.9031(15) A. The magnetic properties of 1-4 have been investigated in the temperature range 1.9-300 K. The magnetic behavior of complexes 1 and 4 is that of antiferromagnetically coupled copper(II) dimers with J = -43.7 (1) and -2.1 cm(-)(1) (4) (the Hamiltonian being H = -JS(A).S(B)). An overall ferromagnetic behavior is observed for complexes 2 and 3. Despite the structural complexity of 2, its magnetic properties correspond to those of magnetically isolated tppz-bridged dinuclear copper(II) units with an intermediate antiferromagnetic coupling (J = -37.5 cm(-)(1)) plus a ferromagnetic chain of hexanuclear double azido-bridged copper(II) units (the values of the magnetic coupling within and between the hexameric units being +61.1 and +0.0062 cm(-)(1), respectively). Finally, ...

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Section: Introductionmentioning

confidence: 99%

Crystal Structures and Magnetic Properties of 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (tppz)-Containing Copper(II) Complexes

et al. 2003

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“…As described in the introduction, only a few bppz coordination polymers of Mn(II), Cu(II), Cd(II), and Ag(I) in bridging bis–bidentate mode (ii–d) have been reported. Additionally, the limited mononuclear Cu(I)–bppz complex in coordination mode (ii–a), homo– and heterometallic dinuclear Cu(I)–bppz complexes in coordination mode (ii–d), and Cu(I)–bppz coordination polymers in coordination modes (ii–e) and (ii–f) have been reported as known Cu(I)–bppz complexes. Therefore, complex 3 can be considered a rare homometallic Cu(I)–bppz coordination polymer containing bridging bis–bidentate mode (ii–d).…”

Section: Resultsmentioning

confidence: 99%

“…The most common types of these modes are five–membered bidentate (ii–a) and bis–bidentate modes (ii–d). Mononuclear bppz complexes of Co(II), Cu(I), Cu(II), Ru(II), Rh(III), Pd(II), Ir(III), Re(I), Pt(II), Pt(IV), and Ln(III) (Ln=Nd, Eu, and Tb) have been reported in coordination mode (ii–a), together with multinuclear and polymeric bppz complexes of Mn(II), Cu(II), Cu(II)/Mo m O n , Re(0), Os(0), Os(I), and Pb(II) containing coordination mode (ii–a). The most likely homometallic dinuclear bppz complexes of Mn(II), Co(II), Ni(II), Cu(II), Ru(II), Re(I), and Pt(II) have been widely known in coordination mode (ii–d), together with multinuclear and polymeric complexes of Cu(I), Cu(II), and Re(0) containing coordination mode (ii–d).…”

Section: Introductionmentioning

confidence: 99%

Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine–, Pyrazine–, and Triazine–based Ligands with Several 2–Pyridyl Groups

et al. 2016

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The reactions of [Cu(MeCN)4]BF4 or [Cu(C2H4)n]ClO4 complexes with 4,6–bis(2–pyridyl)pyrimidine (bppym) in Me2CO under C2H4 afforded dinuclear Cu(I)–bppym/C2H4 adducts [Cu2‐(bppym)(C2H4)2](BF4)2•Me2CO (1) and [Cu2(bppym)2(C2H4)2](ClO4)2•Me2CO (2), respectively. One Cu(I) atom is coordinated by bppym and C2H4 in a distorted trigonal–planar geometry. The other Cu(I) atom is coordinated by bppym, Me2CO, and C2H4 toward a distorted tetrahedral geometry. The reaction of [Cu(MeCN)4]BF4 with 2,3–bis(2–pyridyl)pyrazine (bppz) in MeOH under C2H4 afforded a Cu(I)–bppz coordination polymer {[Cu2(bppz)2](BF4)2•MeOH}n (3). Two Cu(I) atoms are alternately bridged by two bppz to form a 1–D zigzag–chain structure. Each Cu(I) coordination sphere is largely distorted from a normal tetrahedral structure toward a square planar structure. The reaction of [Cu(MeCN)4]PF6 with 2,4,6–tris(2–pyridyl)–s–triazine (tptz) in MeEtCO under C2H4 afforded a tetranuclear Cu(I)–tptz/C2H4 adduct [Cu4(tptz)2(C2H4)2(MeCN)2](PF6)4•MeEtCO (4 b). Two Cu(I) atoms are bridged by the central triazine ring, the 2–pyridyl group, the central triazine ring, and the 2–pyridyl group in a different tptz to form a double helical structure. The other Cu(I) atom is coordinated by the central triazine ring, the 2–pyridyl group, MeCN, and C2H4 in a distorted tetrahedral geometry. The reaction of [Cu(MeCN)4]PF6 with tetra–2–pyridylpyrazine (tppz) in MeOH under C2H4 afforded a tetranuclear Cu(I)–tppz complex [Cu4(tppz)2(MeCN)4](PF6)4•MeOH (5 a). Each Cu(I) atom is coordinated by the central pyrazine ring, the 2–pyridyl group, the 2–pyridyl group in a different tppz, and MeCN in a distorted tetrahedral geometry. These four Cu(I) atoms are bridged by the two opposite tppz ligands to form a unique tetranuclear Cu(I) cage structure.

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“…The copper-phosphorus distances are nearly identical at 2.2461(8) and 2.2550(8) Å and are similar to the values in other Cu I complexes. [14,15] The copper ion binds to the bidentate site of L with Cu-N distances of 2.052 (2) + (where dmp is 2,9-dimethyl-1,10-phenanthroline). [16] The heterocyclic fragments of L containing nitrogens N(3), N(4) and N(5) are coplanar whereas the heterocyclic fragment is tilted by 13.9°.…”

Section: Crystal Structure Of [Cul(pph 3 ) 2 ]Clo 4 ·2ch 3 Cn (6)mentioning

confidence: 99%

Coordination Chemistry of the Ditopic Ligand 4‐[6‐(2‐Pyridyl)‐2‐pyridyl]‐6‐(2‐pyridyl)pyrimidine: Encapsulation of Nitrate by [2 × 2]Grid Complexes

2005

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[2,3-Di(2-pyridyl)pyrazine-N1,N2']bis(triphenylphosphine)copper(I) nitrate ethanol solvate

Cited by 7 publications

References 3 publications

Crystal Structures and Magnetic Properties of 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (tppz)-Containing Copper(II) Complexes

Crystal Structures and Magnetic Properties of 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (tppz)-Containing Copper(II) Complexes

Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine–, Pyrazine–, and Triazine–based Ligands with Several 2–Pyridyl Groups

Coordination Chemistry of the Ditopic Ligand 4‐[6‐(2‐Pyridyl)‐2‐pyridyl]‐6‐(2‐pyridyl)pyrimidine: Encapsulation of Nitrate by [2 × 2]Grid Complexes

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