Home Crystal structure of aquadichlorido(2,4,6-tri-2-pyridyl-1,3,5-triazine-κ3N,N′,N′′)nickel(II) monohydrate, C18H16Cl2N6NiO2
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Crystal structure of aquadichlorido(2,4,6-tri-2-pyridyl-1,3,5-triazine-κ3N,N′,N′′)nickel(II) monohydrate, C18H16Cl2N6NiO2

  • Nermin Kahveci Yağci , Kutalmış Güven EMAIL logo and Gökçen Dikici Yildiz
Published/Copyright: April 12, 2017

Abstract

C18H16Cl2N6NiO2, monoclinic, P21/n (no. 14), a = 8.5737(6) Å, b = 11.4177(9) Å, c = 20.3031(16) Å, β = 99.309(3)°, V = 1961.3(3) Å3, Z = 4, Rgt(F) = 0.0479, wRref(F2) = 0.0865, T = 293 K.

CCDC no.:: 1498905

The asymmetric unit of the title crystal structure is shown in the figure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters.

Table 1

Data collection and handling.

Crystal:Yellow block
Size:0.15 × 0.11 × 0.10 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:12.9 cm−1
Diffractometer, scan mode:Bruker APEX-II, φ and ω
2θmax, completeness:57°, >99%
N(hkl)measured, N(hkl)unique, Rint:46716, 4875, 0.090
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 3484
N(param)refined:278
Programs:SHELX [1], Bruker programs [2], enCIFer [3]
Table 2

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

AtomxyzUiso*/Ueq
Ni10.77445(4)0.04329(3)0.18674(2)0.02493(10)
Cl10.84634(9)0.17357(7)0.10363(4)0.03884(18)
Cl20.81961(10)0.17681(6)0.27570(4)0.03905(19)
N11.0000(2)−0.04491(19)0.20175(11)0.0261(5)
N20.8439(2)−0.25778(19)0.07688(10)0.0263(5)
N30.7426(2)−0.08996(18)0.12234(11)0.0234(5)
N40.5285(3)0.05865(19)0.14086(12)0.0291(5)
N50.7854(3)−0.4543(2)0.00228(11)0.0335(5)
N60.5749(2)−0.19903(19)0.04259(11)0.0268(5)
O1w0.9317(3)−0.5485(3)0.12918(13)0.0531(7)
C90.4798(3)−0.0236(2)0.09430(13)0.0266(6)
C70.6992(3)−0.2701(2)0.04021(13)0.0260(6)
C51.0056(3)−0.1420(2)0.16434(13)0.0243(6)
C100.3279(3)−0.0287(3)0.05949(15)0.0338(7)
H100.298240−0.0865130.0276390.041*
C130.4235(3)0.1379(3)0.15344(16)0.0371(7)
H130.4553620.1952270.1853350.045*
C11.1283(3)−0.0172(2)0.24420(14)0.0329(7)
H11.1260330.0497870.2700950.040*
C80.6035(3)−0.1099(2)0.08446(13)0.0237(6)
C60.8575(3)−0.1669(2)0.11823(12)0.0224(5)
O2w0.7026(4)−0.0668(2)0.25776(14)0.0534(7)
C140.6738(3)−0.3708(2)−0.00643(13)0.0265(6)
C120.2685(4)0.1383(3)0.12082(17)0.0428(8)
H120.1978490.1947260.1310720.051*
C41.1375(3)−0.2126(3)0.16949(15)0.0363(7)
H41.137283−0.2796530.1434410.044*
C110.2202(3)0.0553(3)0.07352(16)0.0416(8)
H110.1168180.0548910.0509570.050*
C31.2696(3)−0.1815(3)0.21426(17)0.0430(8)
H31.360457−0.2272180.2186850.052*
C170.6323(4)−0.5604(3)−0.08680(14)0.0379(7)
H170.620926−0.627054−0.1135170.045*
C160.5198(4)−0.4740(3)−0.09563(14)0.0379(7)
H160.431654−0.480697−0.1287770.045*
C180.7624(4)−0.5472(3)−0.03784(15)0.0399(7)
H180.838191−0.606252−0.0324870.048*
C150.5392(3)−0.3765(2)−0.05445(13)0.0317(6)
H150.464343−0.316893−0.0588750.038*
C21.2658(3)−0.0826(3)0.25210(16)0.0402(7)
H21.353721−0.0599910.2824570.048*
H2A0.702(4)−0.132(3)0.2549(19)0.055(12)*
H2B0.670(5)−0.043(3)0.287(2)0.064(14)*
H1A0.896(5)−0.507(4)0.097(2)0.070(14)*
H1B0.920(7)−0.615(6)0.119(3)0.14(3)*

Source of materials

2,4,6-Tri-(2-pyridyl)-1,3,5-triazine (TPTZ) was purchased from Sigma Aldrich and used without purification. All the solvents, TPTZ and NiCl2 ⋅ 6H2O were obtained from Sigma Aldrich and used without any purification.

A hot EtOH solution of 2,4,6-tri-(2-pyridyl)-1,3,5-triazine (0.312 g; 1.0 mmol) was added to NiCl2 ⋅ 6H2O (0.237 g; 1.0 mmol) in EtOH. The reaction mixture was refluxed for 40 minutes. The yellow crystals of the title complex were grown from the filtrate by slow evaporating at room temperature for six weeks.

Experimental details

Aromatic H atoms were positioned geometrically and allowed to ride on their parent atoms, with Uiso(H) = 1.2Ueq(parent atom) with a C—H distance of 0.93 Å. Hydrogen atoms of water molecules were located from electron density map.

Comment

2,4,6-Tri-(2-pyridyl)-1,3,5-triazine (TPTZ), a well known ligand, has been used as a reagent for various metal ions (such as: AlIII, CuII, AgII, CoII, NiII, MnII). Some physical and biological properties of these complexes have recently been reported [4], [5], [6], [7], [8], [9].

The title compound Ni[C18H12N6⋅H2O]Cl2⋅H2O is isostructural with the manganese complex [9].

The compound is monomeric, with an Ni centre octahedrally coordinated by three N atoms of the TPTZ ligand, one water molecule and two chlorido ligands. Two nitrogen atoms (N1 and N4) of pyridyl rings, one nitrogen atom (N3) of the triazine ring from the TPTZ ligand and one Cl atom (Cl2) form the equatorial base, while the O atom (O2w) of a water molecule and the other Cl atom (Cl1) occupy the axial positions. The bond distances and angles around the NiII ion significantly deviate from 180°: O2w—Ni1—Cl1 (177.61(9)°), N3—Ni1—Cl2 (170.84(7)°), N4—Ni1—N1 (152.22(8)°). As expected, the N–Ni–N chelating angles are with values of N1—Ni1—N3 (76.19(8)°) and N3—Ni1—N4 (76.10(8)°) more acute than the Cl1—Ni1—Cl2 bond angle (96.27(3)°). The Ni—Cl bond lengths are approximately equal (2.4035(8) Å and 2.3473(8) Å). The Ni—Npy bonds (2.158(2) and 2.170(2) Å) are longer than the Ni—Ntriz bond (1.996(2) Å). These results are similar to the related manganese complex [9]. The TPTZ ligands slightly deviate from planarity: the three pyridyl rings are twisted with respect to the central triazine ring by angles of 2.99(17)°, 2.54(17)° and 13.25(15)° with the N5 ring (uncoordinated pyridine ring) displaying the highest degree of twisting. The uncoordinated pyridine ring was reported as 11.8° twisting angle in the manganese analogue [9]. The TPTZ ligand, with the exception of the non-coordinating pyridyl moiety is close to planar with an rms deviation of 0.0468 Å from the best fit plane through all ligand atoms. The ligand plane also lies close to the equatorial plane of the complex defined by the Cl2, N1, N3 and N4 donor atoms with 4.60(7)° and close to the axial plane of the complex defined by the Cl1, Cl2, O2w and N3 donor atoms with 86.52(6)°.

The Ni[C18H12N6⋅H2O]Cl2⋅H2O complex molecules are assembled into a 2D network by OH⋯N, OH⋯O and OH⋯Cl hydrogen bonds. The crystal structure is also stabilized by intermolecular π-π stacking interactions between TPTZ ligands (centroid-centroid distance = 3.814(4) Å).

Acknowledgement

The authors gratefully acknowledge Kırıkkale University Scientific Research Centre for financial support of this work (Grant No. 2013/31) and also Scientific and Technological Research Application and Research Center, Sinop University, Turkey, for the use of the Bruker D8 QUEST diffractometer.

References

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Received: 2016-10-24
Accepted: 2017-3-19
Published Online: 2017-4-12
Published in Print: 2017-5-24

©2017 Nermin Kahveci Yağci et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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