PYRIDIN-2-YL

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[1 Meth­­oxy 3 (pyridin 2 yl)indolizin 2 yl](pyridin 2 yl)methanone

[1 Meth­­oxy 3 (pyridin 2 yl)indolizin 2 yl](pyridin 2 yl)methanone

Indolizines are used as dyes (Weidner et al., 1989), pharma- ceuticals (Singh & Mmatli, 2011), and spectroscopic sensitizers (Gilchrist, 2001; Katrizky et al., 1999; Sarkunam & Nallu, 2005; Vemula et al., 2011; Weeler, 1985a,b). Indolizines are rather scarce in nature whereas the reduced form of these hetero- aromatic bicyclic compounds, the indolizidines, are quite common, see: Michael (2007) and references therein. Well defined substitution patterns are required (Sarkunam & Nallu, 2005; Swinbourne et al., 1978; Uchida & Matsumoto, 1976) and therefore, different transition-metal mediated and metal-free strategies for the synthesis of substituted indolizines have been developed (Jacobs et al., 2011; Swinbourne et al., 1978; Kel’in et al., 2001; Kim et al., 2010; Liu et al., 2007; Morra et al., 2006; Seregin & Gevorgyan, 2006; Yan & Liu, 2007). Pyridi- nium N-methylides react with acetylenes or with ethylenes in the presence of an oxidant to make indolizines (Miki et al., 1984; Padwa et al., 1993; Wei et al., 1993). For cyclization of 1,1- diacetyl-2-(2-pyridyl)ethylene in acetic acid anhydride or in dimethylsulfoxide-yielding indolizines, see: Pohjala (1974, 1977).

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Synthesis, Experimental and Theoretical Characterization of Bidentate 5 Nitro 2 (Pyridin 2 Yl) 1H Benzo[D] Imidazole Ligand and its Pd (II) Complex

Synthesis, Experimental and Theoretical Characterization of Bidentate 5 Nitro 2 (Pyridin 2 Yl) 1H Benzo[D] Imidazole Ligand and its Pd (II) Complex

compared with x-ray diffraction data available for cis-dichloro-(2-pyridin-benzimidazole) palladium (II) complex[17]. As one can see, there is a very well agreement between these data. The optimized geometric parameters of Pd(II) complex calculated by OLYP with DZ, DZP. TZ2P basis sets are listed in Table 2.

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2 [(Pyridin 2 yl)amino]­pyridinium 2,4,6 tri­nitro­phenolate

2 [(Pyridin 2 yl)amino]­pyridinium 2,4,6 tri­nitro­phenolate

rings is 4.24 (6)°. The picrate anion is not planar: the three nitro-groups [N4—O2—O3], [N5—O4—O5], [N6—O6— O7] are twisted with respect to the benzene ring, the dihedral angles between their square - least planes are 26.8 (2)°, 4.5 (1)°, 23.0 (3)°. The C—N and C—C bond lengths in the pyridine rings are normal for 2-substituted pyridine derivatives (Fritsky et al., 2006; Moroz et al., 2012; Penkova et al., 2009; Golenya et al., 2012).

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Ethyl 2 phenyl 3 (pyridin 2 yl)­acryl­ate

Ethyl 2 phenyl 3 (pyridin 2 yl)­acryl­ate

O1 0.0373 (9) 0.0499 (11) 0.0811 (13) −0.0064 (8) −0.0143 (9) 0.0188 (10) O2 0.0351 (10) 0.0731 (14) 0.0808 (14) 0.0104 (9) −0.0076 (9) 0.0066 (11) N1 0.0497 (14) 0.0674 (16) 0.0695 (16) −0.0017 (13) 0.0071 (12) −0.0010 (13) C1 0.061 (2) 0.072 (2) 0.077 (2) 0.0069 (17) −0.0048 (18) −0.0055 (18) C2 0.083 (3) 0.074 (2) 0.062 (2) 0.024 (2) −0.0006 (19) 0.0003 (18) C3 0.079 (3) 0.079 (2) 0.069 (2) 0.0131 (19) 0.0274 (19) 0.0153 (19) C4 0.055 (2) 0.067 (2) 0.075 (2) 0.0004 (16) 0.0145 (17) 0.0107 (17) C5 0.0472 (15) 0.0500 (16) 0.0641 (18) 0.0048 (13) 0.0067 (13) 0.0112 (14) C6 0.0431 (15) 0.0498 (16) 0.075 (2) −0.0059 (13) 0.0069 (14) 0.0072 (14) C7 0.0357 (12) 0.0416 (14) 0.0653 (17) 0.0047 (11) 0.0003 (12) 0.0140 (13) C8 0.0420 (14) 0.0401 (14) 0.0627 (17) 0.0049 (11) −0.0002 (12) 0.0107 (12) C9 0.0546 (17) 0.067 (2) 0.067 (2) −0.0122 (15) 0.0031 (16) 0.0116 (16) C10 0.072 (2) 0.067 (2) 0.079 (2) −0.0226 (18) −0.0146 (19) 0.0109 (18)

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2 [3 (Pyridin 1 ium 2 yl) 1H pyrazol 1 yl] 6 [3 (pyridin 2 yl) 1H pyrazol 1 yl]pyridinium sulfate methanol monosolvate

2 [3 (Pyridin 1 ium 2 yl) 1H pyrazol 1 yl] 6 [3 (pyridin 2 yl) 1H pyrazol 1 yl]pyridinium sulfate methanol monosolvate

C2 0.079 (2) 0.078 (2) 0.0627 (19) 0.035 (2) 0.0237 (18) 0.0445 (19) C3 0.082 (2) 0.076 (2) 0.0429 (16) 0.044 (2) 0.0162 (16) 0.0251 (17) C4 0.0577 (17) 0.0513 (18) 0.0465 (15) 0.0196 (15) 0.0112 (14) 0.0177 (14) C5 0.0535 (16) 0.0457 (17) 0.0437 (14) 0.0205 (14) 0.0167 (13) 0.0187 (13) C6 0.0558 (17) 0.0440 (16) 0.0458 (15) 0.0196 (14) 0.0134 (13) 0.0170 (13) C7 0.0514 (17) 0.0538 (19) 0.0665 (18) 0.0087 (15) 0.0031 (15) 0.0301 (16) C8 0.0600 (19) 0.0566 (19) 0.0597 (18) 0.0196 (16) 0.0044 (15) 0.0303 (16) C9 0.0535 (16) 0.0453 (16) 0.0424 (14) 0.0215 (14) 0.0165 (13) 0.0173 (13) C10 0.0591 (18) 0.063 (2) 0.0544 (17) 0.0257 (16) 0.0172 (15) 0.0314 (16) C11 0.0526 (17) 0.073 (2) 0.0581 (18) 0.0192 (17) 0.0113 (14) 0.0305 (17) C12 0.0539 (17) 0.0571 (19) 0.0592 (17) 0.0154 (15) 0.0172 (15) 0.0287 (16) C13 0.0545 (16) 0.0451 (17) 0.0427 (14) 0.0208 (14) 0.0166 (13) 0.0188 (13) C14 0.0522 (17) 0.0539 (18) 0.0522 (16) 0.0184 (15) 0.0122 (14) 0.0185 (15) C15 0.0560 (18) 0.0578 (19) 0.0530 (16) 0.0247 (16) 0.0103 (14) 0.0202 (15) C16 0.0635 (18) 0.0450 (17) 0.0409 (14) 0.0263 (15) 0.0137 (13) 0.0160 (13) C17 0.0630 (19) 0.0444 (16) 0.0431 (15) 0.0258 (15) 0.0129 (14) 0.0157 (13) C18 0.076 (2) 0.068 (2) 0.0525 (16) 0.0421 (18) 0.0160 (15) 0.0295 (17)

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6 [6 (Pyridin 2 yl) 1,2,4,5 tetra­zin 3 yl]pyridin 3 amine monohydrate

6 [6 (Pyridin 2 yl) 1,2,4,5 tetra­zin 3 yl]pyridin 3 amine monohydrate

be assigned on the ternary level (three different hydrogen bonds) for the 11-membered rings formed by four hydrogen bonds involving two amine groups and two water molecules (two brown, one green and one red bond). In order to outline the chains along [101] formed by two different hydrogen bonds, the graph-set descriptor C 2

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Di­phenyl(pyridin 2 yl)­phosphane selenide

Di­phenyl(pyridin 2 yl)­phosphane selenide

Se1 0.01952 (13) 0.01885 (13) 0.01701 (12) 0.00321 (11) −0.00156 (10) 0.00276 (10) P1 0.0138 (3) 0.0140 (3) 0.0127 (3) 0.0002 (3) 0.0005 (2) 0.0005 (2) N1 0.0168 (11) 0.0207 (12) 0.0257 (11) 0.0009 (9) −0.0010 (9) 0.0027 (9) C1 0.0160 (13) 0.0164 (12) 0.0142 (10) 0.0031 (11) −0.0007 (9) 0.0023 (9) C2 0.0217 (14) 0.0247 (16) 0.0201 (13) −0.0027 (11) 0.0031 (10) −0.0015 (10) C3 0.0336 (16) 0.0306 (15) 0.0196 (13) 0.0013 (15) 0.0005 (11) −0.0057 (11) C4 0.0285 (16) 0.0351 (17) 0.0178 (13) 0.0114 (13) 0.0059 (11) 0.0033 (11) C5 0.0170 (13) 0.0280 (15) 0.0229 (13) 0.0036 (11) 0.0054 (11) 0.0099 (11) C6 0.0185 (13) 0.0200 (15) 0.0193 (12) 0.0024 (11) −0.0020 (10) 0.0028 (10) C7 0.0141 (12) 0.0161 (13) 0.0194 (12) −0.0012 (10) 0.0058 (10) −0.0019 (9) C12 0.0256 (13) 0.0230 (14) 0.0167 (12) −0.0026 (12) 0.0021 (10) 0.0000 (10) C11 0.0360 (14) 0.0233 (13) 0.0176 (12) −0.0096 (14) 0.0010 (11) −0.0032 (11) C10 0.0329 (16) 0.0172 (13) 0.0246 (13) −0.0034 (11) 0.0103 (11) −0.0040 (10) C9 0.0273 (17) 0.0213 (14) 0.0327 (15) 0.0037 (12) 0.0009 (12) 0.0000 (11) C8 0.0216 (14) 0.0233 (13) 0.0199 (12) −0.0015 (12) −0.0043 (11) −0.0036 (10) C13 0.0142 (12) 0.0168 (13) 0.0149 (11) 0.0028 (10) 0.0030 (9) −0.0026 (9) C17 0.0210 (14) 0.0206 (13) 0.0250 (13) −0.0015 (13) −0.0041 (10) 0.0007 (11) C16 0.0140 (12) 0.0222 (15) 0.0248 (13) −0.0042 (11) 0.0014 (10) −0.0057 (10) C15 0.0191 (14) 0.0244 (14) 0.0227 (12) −0.0061 (11) 0.0025 (10) 0.0026 (10) C14 0.0185 (12) 0.0213 (14) 0.0179 (12) 0.0000 (12) −0.0007 (9) 0.0002 (10)

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Crystal structure of [2,6 di­fluoro 3 (pyridin 2 yl κN)pyridin 4 yl κC4](pentane 2,4 dionato κ2O,O′)platinum(II)

Crystal structure of [2,6 di­fluoro 3 (pyridin 2 yl κN)pyridin 4 yl κC4](pentane 2,4 dionato κ2O,O′)platinum(II)

The molecular structure of the title compound is shown in Fig. 1. The asymmetric unit consists of one Pt II atom, one 2,6- difluoro-2,3-bipyridine ligand and one acetylacetonate anion. The Pt II atom is four-coordinated by the C,N-chelating 2 0 ,6 0 -

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Crystal structure and Hirshfeld surface analysis of di­iodido­{N′ [(E) (phen­yl)(pyridin 2 yl κN)methyl­idene]pyridine 2 carbohydrazide κ2N′,O}cadmium(II)

Crystal structure and Hirshfeld surface analysis of di­iodido­{N′ [(E) (phen­yl)(pyridin 2 yl κN)methyl­idene]pyridine 2 carbohydrazide κ2N′,O}cadmium(II)

Hydrazone ligands show high efficiency in chelating transi- tion-metal ions (Afkhami et al., 2017a); such ligands obtained from pyridine carboxylic acids can act as ditopic ligands because of their two different donor sites, including an N- donor pyridine group and a tridentate coordination pocket, and have the potential to form mono-, di- and multinuclear structures (Afkhami et al., 2017b). In this work, we report the synthesis, crystal structure and Hirshfeld surface analysis of the title Cd II complex, (I), containing the tridentate hydrazone ligand N 0 -[(E)-(pyridin-2-yl)methylidene]pyridine-2-carbohy-

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Aqua­{2 (pyridin 2 yl) N [(pyridin 2 yl)methyl­­idene]ethanamine κ3N,N′,N′′}(sulfato κ2O,O′)copper(II) tetra­hydrate

Aqua­{2 (pyridin 2 yl) N [(pyridin 2 yl)methyl­­idene]ethanamine κ3N,N′,N′′}(sulfato κ2O,O′)copper(II) tetra­hydrate

The sulfate anion has a slightly distorted tetrahedral geometry due to the fact that two of the oxygen atoms of the sulfate group are coordinated to the metal center, with one of the Cu—O distances being considerably longer than the other one (1.963 (2) and 2.750 (2) Å). The S—O bond lengths (S—O4 = 1.450 (3); S—O3 = 1.459 (3); S—O2 = 1.462 (3) and S— O1 = 1.517 (2) Å) indicate a S—O single bond for the tightly copper bonded O atom and S—O bonds between single and double bond character for the other three. The O—S—O angles, which range from 107.01 (15) to 111.23 (16) °, are close to the ideal tetrahedral angle value of 109.5 °.

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2,2 Bis(pyridin 2 yl) 1,3 diazinane

2,2 Bis(pyridin 2 yl) 1,3 diazinane

A solution of 2-dipyridlketone (0.25 g, 1.45 mmol) in anhydrous ethanol (20 ml) was mixed with 1,3-propanediamine (0.16 ml, 1.5 mmoL) and allowed to reflux for about four hours. The resulting mixture was concentrated under reduced pressure and the title compound was precipitated by the addition of 40 ml of ice cool distilled water. The precipitate was filtered off, washed three times with 40 ml of distilled water, recrystallized in ethanol and allowed to stand at room temperature. After three days, colourless crystals suitable for single-crystal X-ray data collection were obtained (0.24 g, yield 77%).

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Crystal structure of phen­yl(pyridin 2 yl)methanol

Crystal structure of phen­yl(pyridin 2 yl)methanol

C6 0.0362 (15) 0.0463 (19) 0.0476 (19) 0.0058 (13) 0.0045 (15) −0.0004 (15) C7 0.0500 (18) 0.0578 (19) 0.0426 (19) −0.0030 (15) 0.0052 (15) −0.0001 (16) O8 0.0827 (17) 0.0741 (18) 0.0530 (15) 0.0020 (14) 0.0260 (13) 0.0028 (13) C9 0.0452 (16) 0.0391 (15) 0.0383 (15) −0.0036 (14) 0.0017 (14) 0.0062 (14) C10 0.059 (2) 0.047 (2) 0.069 (2) −0.0019 (17) −0.0103 (18) −0.0040 (17) C11 0.052 (2) 0.072 (2) 0.090 (3) 0.0003 (19) −0.009 (2) 0.010 (2)

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5,6 Di­methyl 2 (pyridin 2 yl) 1 [(pyri­din 2 yl)meth­yl] 1H benzimidazole

5,6 Di­methyl 2 (pyridin 2 yl) 1 [(pyri­din 2 yl)meth­yl] 1H benzimidazole

4,5-dimethyl-1,2-diaminobenzene (2.00 g, 14.7 mmole) was stirred in absolute ethanol (60 ml) for five minutes under nitrogen. 2-pyridinecarboxaldehyde (2.80 ml, 3.15 g, 29.4 mmole) was added dropwise to the reaction mixture with stirring at room temperature. After 24 h, the solution had turned from red to orange with the formation of a precipitate. The reaction mixture was chilled and then filtered using an HPLC grade filter and washed with water. The orange solid was dried yielding 1.37 g (29.7% yield) of pure product. 1 H NMR (400 MHz, CDCl

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Determination of Cd(II) in food and water samples using 2 hydroxy N' (1  (pyridin 2 yl)ethylidene)benzohydrazide as a sensitive analytical reagent

Determination of Cd(II) in food and water samples using 2 hydroxy N' (1 (pyridin 2 yl)ethylidene)benzohydrazide as a sensitive analytical reagent

Effect of pH: Into a series of 10-mL volumetric flasks, 1.0 mL of Cd(II) solution (1.0x10 -4 M), 1.0 mL of ligand solution (1.0x10 -4 M), 1.0 mL of 0.01% thiosulphate solution and 4.0 mL of buffer of varying pH (1.0 - 7.0) are added and made up to the mark with double distilled water and the absorbance is measured against reagent blank at 358 nm. The absorbance increases from pH: 1.0-6.0 then decreases. From this study it is optimized that the pH 6.0 is the optimum pH for further studies. (Figure 2)

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[(1R*,2S*) N1 Benzyl 2 phenyl 1 (pyridin 2 yl) N2 (pyridin 2 ylmeth­yl)ethane 1,2 di­amine]­di­chloridozinc(II)

[(1R*,2S*) N1 Benzyl 2 phenyl 1 (pyridin 2 yl) N2 (pyridin 2 ylmeth­yl)ethane 1,2 di­amine]­di­chloridozinc(II)

C2 0.049 (3) 0.042 (3) 0.038 (3) 0.001 (3) 0.017 (3) 0.004 (2) C3 0.039 (3) 0.034 (3) 0.043 (3) −0.003 (2) 0.019 (2) 0.000 (2) N4 0.037 (2) 0.050 (3) 0.038 (2) 0.001 (2) 0.0144 (19) −0.002 (2) C10 0.046 (3) 0.071 (4) 0.047 (3) −0.001 (3) 0.023 (3) −0.003 (3) C11 0.048 (4) 0.061 (4) 0.072 (4) 0.008 (3) 0.029 (3) 0.006 (4) C12 0.068 (5) 0.074 (5) 0.073 (5) 0.018 (4) 0.017 (4) 0.006 (4) C13 0.091 (7) 0.120 (9) 0.097 (7) 0.040 (6) 0.014 (5) 0.010 (6) C14 0.107 (8) 0.129 (10) 0.133 (10) 0.062 (7) 0.028 (7) 0.021 (8) C15 0.131 (10) 0.107 (9) 0.165 (12) 0.057 (8) 0.062 (9) −0.009 (8) C16 0.091 (6) 0.099 (7) 0.105 (7) 0.026 (5) 0.040 (5) −0.012 (6) C21 0.049 (3) 0.048 (4) 0.039 (3) 0.003 (3) 0.020 (3) 0.008 (3) N22 0.121 (5) 0.050 (4) 0.055 (3) 0.002 (3) 0.047 (4) −0.001 (3) C23 0.162 (9) 0.037 (4) 0.087 (6) 0.003 (5) 0.068 (6) −0.005 (4) C24 0.135 (7) 0.067 (5) 0.070 (5) 0.004 (5) 0.057 (5) −0.026 (4) C25 0.137 (7) 0.083 (6) 0.056 (4) −0.012 (5) 0.059 (5) −0.007 (4) C26 0.106 (6) 0.055 (4) 0.048 (4) −0.002 (4) 0.037 (4) 0.000 (3) C31 0.043 (3) 0.048 (4) 0.048 (3) 0.000 (3) 0.015 (3) −0.014 (3) C32 0.063 (5) 0.092 (6) 0.078 (5) −0.020 (4) 0.013 (4) −0.011 (4) C33 0.069 (6) 0.134 (9) 0.092 (7) −0.028 (6) 0.008 (5) −0.036 (7) C34 0.067 (6) 0.133 (9) 0.063 (5) 0.011 (6) −0.002 (4) −0.032 (6) C35 0.076 (5) 0.108 (7) 0.050 (4) 0.023 (5) 0.004 (4) −0.017 (4) C36 0.054 (4) 0.067 (4) 0.048 (3) 0.011 (3) 0.006 (3) −0.008 (4) C40 0.037 (3) 0.065 (4) 0.053 (3) 0.000 (3) 0.017 (3) −0.006 (3) C41 0.042 (3) 0.054 (4) 0.042 (3) 0.002 (3) 0.017 (3) −0.004 (3) N42 0.039 (3) 0.056 (3) 0.043 (3) 0.000 (2) 0.015 (2) −0.006 (2) C43 0.055 (4) 0.065 (4) 0.047 (3) −0.007 (3) 0.015 (3) −0.006 (3) C44 0.082 (5) 0.073 (5) 0.055 (4) 0.002 (4) 0.030 (4) −0.013 (4) C45 0.067 (5) 0.088 (6) 0.063 (4) 0.014 (4) 0.031 (4) −0.010 (4) C46 0.043 (3) 0.081 (5) 0.056 (4) 0.007 (3) 0.022 (3) −0.006 (4)

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N (Pyridin 2 yl)hydrazinecarbo­thio­amide

N (Pyridin 2 yl)hydrazinecarbo­thio­amide

N4 is cis to the thionyl atom S1 about the C6—N3 bond. These are in agreement with values in thiosemicarbazones (Fun et al., 2005). This is due to the presence of the pyridine ring N atom, which forms an intramolecular hydrogen bond and facilitates the geometry. This observation was confirmed by the geometry of 4-phenyl-1-(propan-2-ylidene)thiosemicarbazide (Jian et al., 2005), where the hydrazine N atom is cis to the thioamide N atom and trans to the thionyl S atom.

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Crystal structure of 2 hy­dr­oxy­imino 2 (pyridin 2 yl) N′ [1 (pyridin 2 yl)ethyl­­idene]acetohydrazide

Crystal structure of 2 hy­dr­oxy­imino 2 (pyridin 2 yl) N′ [1 (pyridin 2 yl)ethyl­­idene]acetohydrazide

A solution of 2-hydroxyimino-2-(pyridin-2-yl)acetohydrazide (0.36 g, 2 mmol), prepared according to a published procedure (Zyl et al., 1961; Kolar et al., 1991), in methanol (20 ml) was treated with 2-acetylpyridine (0.242 g, 2 mmol) and the mixture was heated under reflux for 3 h. After cooling, the solvent was evaporated under vacuum and the resulting product was recrystallized from methanol, giving colourless block-like crystals of the title compound (yield 0.52 g; 92%).

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Crystal structure of aqua­(nitrato κO)dioxido{2 [3 (pyridin 2 yl κN) 1H 1,2,4 triazol 5 yl κN4]phenolato κO}uranium(VI) aceto­nitrile monosolvate monohydrate

Crystal structure of aqua­(nitrato κO)dioxido{2 [3 (pyridin 2 yl κN) 1H 1,2,4 triazol 5 yl κN4]phenolato κO}uranium(VI) aceto­nitrile monosolvate monohydrate

Crystal data, data collection and structure refinement details are summarized in Table 2. All hydrogen atoms were located in a difference Fourier map. The positional parameters of water H atoms were refined, with the restraint O—H = 0.860 (2) A ˚ and the constraint U iso (H) = 1.5U eq (O). All other

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Crystal structure of bis­­(acetato κ2O,O′)di­aqua­[1 (pyridin 2 yl­methyl­­idene κN) 2 (pyridin 2 yl κN)hydrazine κN1]terbium(III) nitrate monohydrate

Crystal structure of bis­­(acetato κ2O,O′)di­aqua­[1 (pyridin 2 yl­methyl­­idene κN) 2 (pyridin 2 yl κN)hydrazine κN1]terbium(III) nitrate monohydrate

manner. The second coordinating water molecule (O6W) acts as hydrogen-atom donor, forming hydrogen bonds with the non-coordinating water molecule and the nitrate anion, as shown in Fig. 1. The acetate O atoms act as acceptors in the hydrogen bonds with the HN groups of adjacent complex cation. Furthermore, the non-coordinating water molecule forms hydrogen bonds to the nitrate anions. There are also some C—H O contacts, which contribute to the crystal architecture and may be considered as weak hydrogen bonds (Fig. 2, Table 2).

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{9 Hexyl 2 [2 phenyl 6 (pyridin 2 yl)pyridin 4 yl] 9H carbazole}di­iodido­zinc

{9 Hexyl 2 [2 phenyl 6 (pyridin 2 yl)pyridin 4 yl] 9H carbazole}di­iodido­zinc

(7.57°) (Alizadeh et al. , 2009), the reason is that the introduction of benzene increases steric hindrance. Zn—I bond distances are 2.5396 (6) and 2.5623 (6) Å, which are within normal range. Compared to (II),the distances of Zn—N are a little larger. I—Zn—I and N—Zn—N bond angles are 118.56 (2)° and 80.1 (1)°, which is smaller than that of (II), respectively.

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