The Use of Polarizable [AuX2(CN)2]− (X = Br, I) Building Blocks Toward the Formation of Birefringent Coordination Polymers

Ovens, Jeffrey S.; Geisheimer, Andrew R.; Bokov, Alexei A.; Ye, Zuo‐Guang; Leznoff, Daniel B.

doi:10.1021/ic101357y

Cited by 45 publications

(41 citation statements)

References 55 publications

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“…They consist of the three bidentate ligands L which are chelate coordinated to Fe(II) atom, resulting in a distorted octahedral arrangement. The averaged Fe-N bond distances (1.965(6) and 1.969(6) Å, respectively), bite N-Fe-N angles (81.7(4) and 82.7(2)°, respectively) and opposite (trans) N-Fe-N angles (176(1) and 175(1)°, respectively) in (1) and (2) are very similar and correspond to values observed in other low-spin bipyridine-or phenanthroline iron(II) complexes[21][22][23][24][25][26][27][28][29][30][31]. Bond lengths and angles within the individual aromatic rings of the neutral ligands L are close to those found in other structures, too.…”

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confidence: 68%

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Low-dimensional compounds containing cyanido groups. XXVII. Two forms of nitrosodicyanomethanide in Fe(II) complexes

Potočňák

Váhovská

2014

Zeitschrift Für Kristallographie - Crystalline Materials

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Two new ionic [Fe(bpy) 3 ](ONC(CN) 2 ) 2 ·2HONC(CN) 2 (1) and [Fe(phen) 3 ](ONC(CN) 2 ) 2 (2) complexes have been synthesized (bpy is 2,2′-bipyridine, phen is 1,10-phenanthroline). X-ray structural analysis ((1): P2 1 /n, a = 11.7294 (5), b = 22.0774(11), c = 16.2415(8) Å, β = 98.910(5)°; (2): P2 1 /c, a = 9.4951(3), b = 21.6640(9), c = 17.3365(6) Å, β = 92.483(3)°) revealed that their structures consist of one [Fe(bpy) 3 ] 2+ or [Fe(phen) 3 ] 2+ complex cation and two uncoordinated nitrosodicyanomethanide, ONC(CN) 2 -counteranions; two molecules of unique nitrosodicyanomethanide acid HONC(CN) 2 were found in (1), too. In the cations, the Fe(II) atom is coordinated by six nitrogen atoms of chelate coordinated neutral ligands forming a distorted octahedron coordination geometry. Both structures are stabilized by π-π interactions and hydrogen bonds, which are very strong in (1).

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supporting

confidence: 68%

“…are two extremely well studied metal complexes[21][22][23][24][25][26][27][28][29][30][31] thus we describe their structures only briefly. They consist of the three bidentate ligands L which are chelate coordinated to Fe(II) atom, resulting in a distorted octahedral arrangement.…”

mentioning

confidence: 99%

Low-dimensional compounds containing cyanido groups. XXVII. Two forms of nitrosodicyanomethanide in Fe(II) complexes

Potočňák

Váhovská

2014

Zeitschrift Für Kristallographie - Crystalline Materials

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“…It is noteworthy that the specific halogen-halogen interactions previously found in organohalogen crystals [22][23][24] were also revealed in the structures of coordination compounds [10,[25][26][27][28]. The nature and strength of these interactions are still under discussions, which point out on their important role as constituents of supramolecular crystal structure.…”

Section: Resultsmentioning

confidence: 89%

Structure of diethylenetriammonium tetrabromoaurates(III)

2014

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In HAuBr 4 interaction with diethylenetriamine in HBr, new complexes (DienH 3 ) 2 [AuBr 4 ] 3 Br 3 ⋅4H 2 O (I) and (DienH 3 )[AuBr 4 ] 3 ⋅H 2 O (II) (where DienH 3 3 + is protonated diethylenetriamine) are obtained, which are characterized by elemental analysis, single crystal X-ray diffraction, thermogravimetry, and IR spectroscopy. For I, the crystals are triclinic, crystallize in the space group Р-1, a = 7.9717(3) Å, b = 11.0178(4) Å, c = 12.6765(5) Å, α = 75.960(1)°, β = 75.031(1)°, γ = 75.681(1)°, V = 1023.02(7) Å 3 , Z = 2. For II, the crystals are orthorhombic, crystallize in the space group Pnma, unit cell parameters are as follows: a = 4.2981(8) Å, b = 15.394(3) Å, c = 13.402(3) Å, V = 886.7(3) Å 3 , Z = 4. In the literature, there are few works dealing with the study of crystal structures containing complex tetrabromoaurate anions [AuBr 4 ] -, as opposed to the complexes with [AuCl 4 ] -. The crystal structures of K[AuBr 4 ] [1], M[AuBr 4 ]⋅2H 2 O (M = Na [2], K [3]), and mixed M 2 [AuBr 2 ][AuBr 4 ] (M = Rb [4], Cs [5]) complexes were determined. There are data on the structure of complexes, in which different class protonated organic compounds appear as simple cations: (C 10 H 13 N 4 O 5 )[AuBr 4 ]⋅2H 2 O [6], ((C 9 H 6 NCOOH) 2 H)[AuBr 4 ]⋅H 2 O [7], (C 20 H 15 N 2 ) 2 [AuBr 2 ][AuBr 4 ] [8], (C 5 NH 6 )[AuBr 4 ] [9], (C 6 H 10 N 2 )[AuBr 4 ]Br⋅H 2 O [10]. In all studied complexes, the [AuBr 4 ] -anion has a square-planar configuration. In some structures, weak contacts of the gold atom with the bromine atoms of the neighboring complex ions or with the cation atoms were noticed, so that the coordination environment of Au(III) can be described as being 4+1 or 4+2. The same coordination environment of Au(III) was found in the structures of double complex salts (DCSs) with doubly or triply charged complex cations of another metal: [Co(NH 3 ) 6 ][AuBr 4 ]Br 2 [11], [Co(En) 3 ][AuBr 4 ] 2 Br [12], [M(NH 3 ) 5 Br][AuBr 4 ] 2 ⋅H 2 O (M = Ir, Rh) [13]. Completing the square coordination of the gold atom to a tetragonal pyramid or elongated square pyramid has been also found in DCSs containing [AuCl 4 ] -in their composition [11, 14, 15]. It should be noted that substituting chloride by bromide in [AuCl 4 ] -and varying the nature of ligands of the inner coordination sphere of multicharged cations makes it possible to obtain DCSs with different metal ratios. For example, with doubly charged complex cations Ir and Rh, DCSs of the [M(NH 3 ) 5 Cl][AuCl 4 ]Cl⋅nH 2 O (n = 0-2) [16, 17] and [M(NH 3 ) 5 Br][AuBr 4 ] 2 ⋅H 2 O [13] composition were obtained. For triplycharged complex cations Co(III), substituting chloride by bromide in the anion did not influence on the stoichiometry and structural features of the DCSs obtained, while substituting the ammonia in the Co(III) cation by ethylenediamine with the same anion gave the DCSs of different stoichiometry [11,12,14].

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“…[44] Metal complexes are of particular interest because of the possibilities of using halogen bonds as a tool in the modification of the redox, magnetic, optical, and chemical reactivity of the metal complexes. [44][45][46] The palladium pincer complex {2,6-bis[(di-t-butylphosphino)methyl]-phenyl}palladium (PCPPd) halides, PCPPdX (X=Cl, Br, or I) have been studied by Johnson and Rissanen as the XB acceptor in systems with I2 as XB donor. [47] The all three crystal structures have similar basic features (Fig.…”

Section: M-x/n/ncs/cn…x Systemsmentioning

confidence: 99%

“…[74]It has also been used for selective recognition of halide anions and employed in host-guest systems. [23] There are examples of the use of halogen bonding for controlling the luminescent properties of Au2-Ag2 clusters and the birefringence properties of chains of square planar Au complexes [45,75]. There are also examples of the utilization of halogen bonding in catalysis.…”

Section: Future Perspectivesmentioning

confidence: 99%