Triaqua(2,2′-biimidazole)oxovanadium(IV) sulfate dihydrate

Abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean '(C±C) = 0.006 A Ê R factor = 0.057 wR factor = 0.102 Data-to-parameter ratio = 12.4For details of how these key indicators were automatically derived from the article, see

A Series of Single, Double, and Triple Me2biim-Bridged Dinuclear, Trinuclear, and Polymeric Complexes: Syntheses, Crystal Structures, and Luminescent Properties

“…Noncoordination of Me 2 biim to Zn 2+ is obviously due to the protonation of the unmethylated N atoms (N1). The N1···Cl distance of 3.199 Å is comparable to the reported N−H···Cl contact (3.112(5) Å),1f indicative of the substantial N···H + ···Cl hydrogen bonds. The two imidazole rings of Me 2 biim are not coplanar with the dihedral angle of 65.0° caused by the repulsion between the two methyl groups, which is greater than the calculated value for N , N ‘-tetramethylene-bridged derivative of 2,2‘-biimidazole (41°) 5a and its Ru(II) derivarive (53°) 5b…”

“…The N1−Zn−N3 angle (112.02(10)°) is similar to the corresponding Cl1−Zn−Cl1‘ (111.43(8)°), but the Cl1−Zn−Cl2 angle (118.17(4)°) in 2 is wider than in 1 (111.35(9)°). The Zn−N distances (average 2.025(3) Å) are identical to the basal Zn−N bonds but significantly shorter than the apical Zn−N distances in the pentacoordinate [Zn 2 (H 2 biim) 5 ] 4+ and [Zn(H 2 biim) 2 (HCO 2 )] + 1a…”

“…The Cd−Cl (2.400(9) Å) is shorter than the Cd−Br (2.532(2) Å) and Cd−I (2.717(8) Å), in accordance with their difference in covalent radii. Note that the Cd−Br bond is considerably shorter than in the hexacoordinate [CdBr 2 (H 2 biim)] [2.702 Å (equatorial) and 2.892(1) Å (axial)] 1b. As in the case of 2 , steric requirements force the two imidazole rings to form the dihedral angle of 88.9(4)°.…”

A Series of Single, Double, and Triple Me2biim-Bridged Dinuclear, Trinuclear, and Polymeric Complexes: Syntheses, Crystal Structures, and Luminescent Properties

“…Noncoordination of Me 2 biim to Zn 2+ is obviously due to the protonation of the unmethylated N atoms (N1). The N1···Cl distance of 3.199 Å is comparable to the reported N−H···Cl contact (3.112(5) Å),1f indicative of the substantial N···H + ···Cl hydrogen bonds. The two imidazole rings of Me 2 biim are not coplanar with the dihedral angle of 65.0° caused by the repulsion between the two methyl groups, which is greater than the calculated value for N , N ‘-tetramethylene-bridged derivative of 2,2‘-biimidazole (41°) 5a and its Ru(II) derivarive (53°) 5b…”

“…The N1−Zn−N3 angle (112.02(10)°) is similar to the corresponding Cl1−Zn−Cl1‘ (111.43(8)°), but the Cl1−Zn−Cl2 angle (118.17(4)°) in 2 is wider than in 1 (111.35(9)°). The Zn−N distances (average 2.025(3) Å) are identical to the basal Zn−N bonds but significantly shorter than the apical Zn−N distances in the pentacoordinate [Zn 2 (H 2 biim) 5 ] 4+ and [Zn(H 2 biim) 2 (HCO 2 )] + 1a…”

“…The Cd−Cl (2.400(9) Å) is shorter than the Cd−Br (2.532(2) Å) and Cd−I (2.717(8) Å), in accordance with their difference in covalent radii. Note that the Cd−Br bond is considerably shorter than in the hexacoordinate [CdBr 2 (H 2 biim)] [2.702 Å (equatorial) and 2.892(1) Å (axial)] 1b. As in the case of 2 , steric requirements force the two imidazole rings to form the dihedral angle of 88.9(4)°.…”

Synthesis, crystal structure and nuclease activity of a new Mn(II) complex involving 2-(2-1H-imidazolyl)-1H-imdazolium ligand

“…It was reported that the metal coordination compound of imidazole could inhibit tumor growth by interacting with DNA [21][22][23]. The presence of an imidazole moiety in biological molecules has encouraged the studies of H 2 biim-containing transition metal complexes [24,25]. However, a few studies about the interaction between the transition metal complexes of 2,2′-biimidazole (Biim) and DNA have been reported, and most of the studies are limited in the structure characterization [26,27].…”

Diaquabis(2,2′-bi-1H-imidazole)manganese(II) benzene-1,4-dicarboxylate

“…For related structures, see: Fortin & Beauchamp (2001); Sang et al (2002); Atencio et al (2004); Wang et al (2007). For background to supramolecular assemblies, see: Ramirez et al (2002); Baca et al (2003).…”

A Series of Single, Double, and Triple Me2biim-Bridged Dinuclear, Trinuclear, and Polymeric Complexes: Syntheses, Crystal Structures, and Luminescent Properties

“…Noncoordination of Me 2 biim to Zn 2+ is obviously due to the protonation of the unmethylated N atoms (N1). The N1···Cl distance of 3.199 Å is comparable to the reported N−H···Cl contact (3.112(5) Å),1f indicative of the substantial N···H + ···Cl hydrogen bonds. The two imidazole rings of Me 2 biim are not coplanar with the dihedral angle of 65.0° caused by the repulsion between the two methyl groups, which is greater than the calculated value for N , N ‘-tetramethylene-bridged derivative of 2,2‘-biimidazole (41°) 5a and its Ru(II) derivarive (53°) 5b…”

“…The N1−Zn−N3 angle (112.02(10)°) is similar to the corresponding Cl1−Zn−Cl1‘ (111.43(8)°), but the Cl1−Zn−Cl2 angle (118.17(4)°) in 2 is wider than in 1 (111.35(9)°). The Zn−N distances (average 2.025(3) Å) are identical to the basal Zn−N bonds but significantly shorter than the apical Zn−N distances in the pentacoordinate [Zn 2 (H 2 biim) 5 ] 4+ and [Zn(H 2 biim) 2 (HCO 2 )] + 1a…”

“…The Cd−Cl (2.400(9) Å) is shorter than the Cd−Br (2.532(2) Å) and Cd−I (2.717(8) Å), in accordance with their difference in covalent radii. Note that the Cd−Br bond is considerably shorter than in the hexacoordinate [CdBr 2 (H 2 biim)] [2.702 Å (equatorial) and 2.892(1) Å (axial)] 1b. As in the case of 2 , steric requirements force the two imidazole rings to form the dihedral angle of 88.9(4)°.…”

Synthesis, crystal structure and nuclease activity of a new Mn(II) complex involving 2-(2-1H-imidazolyl)-1H-imdazolium ligand

“…It was reported that the metal coordination compound of imidazole could inhibit tumor growth by interacting with DNA [21][22][23]. The presence of an imidazole moiety in biological molecules has encouraged the studies of H 2 biim-containing transition metal complexes [24,25]. However, a few studies about the interaction between the transition metal complexes of 2,2′-biimidazole (Biim) and DNA have been reported, and most of the studies are limited in the structure characterization [26,27].…”

Diaquabis(2,2′-bi-1H-imidazole)manganese(II) benzene-1,4-dicarboxylate

“…For related structures, see: Fortin & Beauchamp (2001); Sang et al (2002); Atencio et al (2004); Wang et al (2007). For background to supramolecular assemblies, see: Ramirez et al (2002); Baca et al (2003).…”

A Series of Single, Double, and Triple Me2biim-Bridged Dinuclear, Trinuclear, and Polymeric Complexes: Syntheses, Crystal Structures, and Luminescent Properties

“…Noncoordination of Me 2 biim to Zn 2+ is obviously due to the protonation of the unmethylated N atoms (N1). The N1···Cl distance of 3.199 Å is comparable to the reported N−H···Cl contact (3.112(5) Å),1f indicative of the substantial N···H + ···Cl hydrogen bonds. The two imidazole rings of Me 2 biim are not coplanar with the dihedral angle of 65.0° caused by the repulsion between the two methyl groups, which is greater than the calculated value for N , N ‘-tetramethylene-bridged derivative of 2,2‘-biimidazole (41°) 5a and its Ru(II) derivarive (53°) 5b…”

“…The N1−Zn−N3 angle (112.02(10)°) is similar to the corresponding Cl1−Zn−Cl1‘ (111.43(8)°), but the Cl1−Zn−Cl2 angle (118.17(4)°) in 2 is wider than in 1 (111.35(9)°). The Zn−N distances (average 2.025(3) Å) are identical to the basal Zn−N bonds but significantly shorter than the apical Zn−N distances in the pentacoordinate [Zn 2 (H 2 biim) 5 ] 4+ and [Zn(H 2 biim) 2 (HCO 2 )] + 1a…”

“…The Cd−Cl (2.400(9) Å) is shorter than the Cd−Br (2.532(2) Å) and Cd−I (2.717(8) Å), in accordance with their difference in covalent radii. Note that the Cd−Br bond is considerably shorter than in the hexacoordinate [CdBr 2 (H 2 biim)] [2.702 Å (equatorial) and 2.892(1) Å (axial)] 1b. As in the case of 2 , steric requirements force the two imidazole rings to form the dihedral angle of 88.9(4)°.…”

Synthesis, crystal structure and nuclease activity of a new Mn(II) complex involving 2-(2-1H-imidazolyl)-1H-imdazolium ligand

“…It was reported that the metal coordination compound of imidazole could inhibit tumor growth by interacting with DNA [21][22][23]. The presence of an imidazole moiety in biological molecules has encouraged the studies of H 2 biim-containing transition metal complexes [24,25]. However, a few studies about the interaction between the transition metal complexes of 2,2′-biimidazole (Biim) and DNA have been reported, and most of the studies are limited in the structure characterization [26,27].…”

Diaquabis(2,2′-bi-1H-imidazole)manganese(II) benzene-1,4-dicarboxylate

“…For related structures, see: Fortin & Beauchamp (2001); Sang et al (2002); Atencio et al (2004); Wang et al (2007). For background to supramolecular assemblies, see: Ramirez et al (2002); Baca et al (2003).…”