Home The crystal structure of 1,1′-(((2 (dimethylamino)ethyl)azanediyl)bis(methylene)) bis(naphthalen-2-olato-κ4 N,N′,O,O′)-(pyridine-2,6-dicarboxylato-N,O,O′)- titanium(IV) ─ dichloromethane (2/1), C33H29N3O6Ti
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The crystal structure of 1,1′-(((2 (dimethylamino)ethyl)azanediyl)bis(methylene)) bis(naphthalen-2-olato-κ4 N,N′,O,O′)-(pyridine-2,6-dicarboxylato-N,O,O′)- titanium(IV) ─ dichloromethane (2/1), C33H29N3O6Ti

  • Tiankun Zhao ORCID logo EMAIL logo , Peng Wang , Mingyu Ji , Shanjia Li , Mingjun Yang and Xiuying Pu
Published/Copyright: July 6, 2021

Abstract

C33H29N3O6Ti, monoclinic, C2/c (no. 15), a = 27.4022(15) Å, b = 14.0345(7) Å, c = 17.0047(10) Å, β = 116.009(3)°, V = 5877.3(6) Å3, Z = 8, R gt (F) = 0.0369, wRref (F 2) = 0.1125, T = 100(2) K.

CCDC no.: 2082174

The molecular structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal: Orange block
Size: 0.12 × 0.10 × 0.10 mm
Wavelength: Ga Kα radiation (1.34138 Å)
μ: 2.51 mm−1
Diffractometer, scan mode: Bruker APEX-II, φ and ω
θ max, completeness: 57.1°, >99%
N(hkl)measured , N(hkl)unique, R int: 38312, 6027, 0.052
Criterion for I obs, N(hkl)gt: I obs > 2 σ(I obs), 5177
N(param)refined: 418
Programs: Bruker [1], SHELX [2]
Table 2:

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

Atom x y z U iso*/U eq
C1 0.60189 (7) 0.50113 (13) 0.58013 (12) 0.0233 (4)
C2 0.58945 (7) 0.51514 (13) 0.64972 (12) 0.0216 (4)
C3 0.54729 (7) 0.46373 (14) 0.65755 (13) 0.0257 (4)
H3 0.539570 0.474178 0.706156 0.031*
C4 0.51786 (7) 0.39903 (14) 0.59457 (13) 0.0285 (4)
H4 0.489233 0.365464 0.599549 0.034*
C5 0.52879 (7) 0.38076 (14) 0.52254 (13) 0.0274 (4)
C6 0.57149 (7) 0.43256 (14) 0.51411 (13) 0.0255 (4)
C7 0.58010 (7) 0.41355 (15) 0.43924 (14) 0.0315 (5)
H7 0.607797 0.447275 0.431655 0.038*
C8 0.54954 (8) 0.34773 (16) 0.37731 (15) 0.0379 (5)
H8 0.555907 0.337312 0.327385 0.046*
C9 0.50878 (8) 0.29568 (16) 0.38777 (16) 0.0397 (6)
H9 0.488380 0.248968 0.345741 0.048*
C10 0.49865 (8) 0.31234 (14) 0.45804 (15) 0.0352 (5)
H10 0.470790 0.277395 0.464063 0.042*
C11 0.64373 (7) 0.56345 (14) 0.57011 (12) 0.0231 (4)
H11A 0.651376 0.536388 0.522901 0.028*
H11B 0.627497 0.627221 0.550497 0.028*
C12 0.72841 (7) 0.64323 (13) 0.62014 (11) 0.0203 (4)
H12A 0.707714 0.703407 0.600574 0.024*
H12B 0.731116 0.614728 0.568945 0.024*
C13 0.78488 (7) 0.66628 (12) 0.68869 (12) 0.0185 (4)
C14 0.79433 (7) 0.68331 (12) 0.77415 (12) 0.0185 (4)
C15 0.84694 (7) 0.70365 (13) 0.84046 (12) 0.0215 (4)
H15 0.852252 0.714900 0.898766 0.026*
C16 0.88981 (7) 0.70705 (14) 0.82051 (13) 0.0254 (4)
H16 0.925271 0.718108 0.865577 0.030*
C17 0.88219 (7) 0.69428 (13) 0.73334 (12) 0.0233 (4)
C18 0.82922 (7) 0.67450 (12) 0.66575 (12) 0.0186 (4)
C19 0.82341 (7) 0.66746 (13) 0.57918 (12) 0.0225 (4)
H19 0.788488 0.655293 0.533004 0.027*
C20 0.86674 (8) 0.67768 (14) 0.55999 (13) 0.0266 (4)
H20 0.861538 0.672721 0.501104 0.032*
C21 0.91865 (8) 0.69541 (16) 0.62681 (14) 0.0347 (5)
H21 0.948694 0.701718 0.613397 0.042*
C22 0.92602 (8) 0.70360 (16) 0.71120 (14) 0.0337 (5)
H22 0.961378 0.715836 0.756097 0.040*
C23 0.72777 (7) 0.48444 (13) 0.67352 (13) 0.0241 (4)
H23A 0.767214 0.497935 0.702948 0.029*
H23B 0.720080 0.448072 0.619458 0.029*
C24 0.71249 (7) 0.42561 (13) 0.73265 (13) 0.0262 (4)
H24A 0.674471 0.403672 0.700276 0.031*
H24B 0.736164 0.368694 0.752106 0.031*
C25 0.77619 (7) 0.48459 (14) 0.87507 (13) 0.0281 (4)
H25A 0.789033 0.419579 0.893957 0.042*
H25B 0.779958 0.522532 0.925811 0.042*
H25C 0.797847 0.513437 0.848288 0.042*
C26 0.68845 (8) 0.42931 (14) 0.85141 (14) 0.0306 (4)
H26A 0.649620 0.428229 0.811402 0.046*
H26B 0.693933 0.461093 0.905982 0.046*
H26C 0.702170 0.363861 0.864108 0.046*
C27 0.66641 (7) 0.77403 (13) 0.89390 (11) 0.0197 (4)
C28 0.65133 (8) 0.85380 (14) 0.92549 (13) 0.0274 (4)
H28 0.658098 0.857718 0.985179 0.033*
C29 0.62611 (9) 0.92803 (14) 0.86822 (14) 0.0316 (5)
H29 0.615201 0.983574 0.888247 0.038*
C30 0.61690 (8) 0.92068 (14) 0.78133 (13) 0.0266 (4)
H30 0.599543 0.970676 0.741017 0.032*
C31 0.63362 (7) 0.83877 (13) 0.75503 (12) 0.0195 (4)
C32 0.69347 (7) 0.68601 (13) 0.94366 (12) 0.0205 (4)
C33 0.62923 (7) 0.81744 (13) 0.66596 (12) 0.0216 (4)
N1 0.69711 (5) 0.57630 (10) 0.65008 (10) 0.0192 (3)
N2 0.71818 (6) 0.48192 (11) 0.81012 (10) 0.0225 (3)
N3 0.65750 (5) 0.76734 (10) 0.81067 (9) 0.0169 (3)
O1 0.61798 (5) 0.57717 (9) 0.71411 (8) 0.0217 (3)
O2 0.75358 (5) 0.68096 (9) 0.79766 (8) 0.0197 (3)
O3 0.69884 (5) 0.62172 (9) 0.89296 (8) 0.0218 (3)
O4 0.70781 (5) 0.67830 (10) 1.02224 (8) 0.0276 (3)
O5 0.65263 (5) 0.73842 (9) 0.66427 (8) 0.0236 (3)
O6 0.60584 (6) 0.87121 (10) 0.60429 (9) 0.0353 (4)
Ti1 0.68385 (2) 0.63935 (2) 0.76620 (2) 0.01642 (11)
C1Sa 0.51005 (19) 0.0260 (3) 0.5073 (4) 0.0388 (11)
H1SAa 0.494042 0.090634 0.497869 0.047*
H1SBa 0.548342 0.030660 0.551686 0.047*
Cl1a 0.47435 (7) −0.04917 (14) 0.54657 (14) 0.0779 (5)
Cl2a 0.50780 (5) −0.01697 (13) 0.40881 (9) 0.0598 (4)
  1. aOccupancy: 0.5.

Source of material

The ONON ligand L1: (1,1′-(((2-(dimethyl-amino)ethyl)azanediyl)bis (methylene))bis(naphthalen-2-ol)) was prepared following the literature reported method by prolonging the reaction time from 2 to 6 h [3]. The corresponding Ti(IV) complex was synthesized according to lit. Under a nitrogen atmosphere, L1 (1 mmol, 400 mg) was dissolved in anhydrous THF (15 mL), Ti(OiPr)4 (0.95 mmol, 0.28 mL) was then added to the solution. The reaction was heated to 50 °C and kept stirring for 2 h, Dipic (pyridine-2,6-dicarboxylic acid) (0.95 mmol, 158.8 mg) was added and the reaction was left stirring for another 10 h and monitored by TLC. When the reaction was complete, [L1Ti(IV)(Dipic)] was separated by flash column chromatography (CH2Cl2/CH3OH = 30/1) to obtain a red solid (0.80 mmol, 492.1 mg, 85%). Suitable crystals for X-ray diffraction measurements were obtained by slow diffusion of n–hexane to a dichloromethane solution of [L1Ti(IV)(Dipic)] at room temperature.

Experimental details

H atoms bonded to C atoms were positioned geometrically with C–H = 0.95 Å (aromatic), 0.99 Å (methylene) and 0.98 Å (methyl) and refined in a riding mode [U iso(H) = 1.2U eqC (aromatic and methylene)], 1.5U eqC(methyl).

Comment

Various ONNO ligands stabilizing Ti(IV) complexes containing different substituents have been synthesized and tested for antitumor activities in recent years [4]. The use of pyridine-2,6-dicarboxylate as a second chelator gives a novel heptacoordinated Ti(IV) complex with enhanced aqueous stability and cytotoxicity [5, 6], which is considered as a new generation of anti-tumor Ti complexes [7]. The isotopic titanium complex [45Ti][(Salan)Ti(IV)(Dipic)] could be synthesized based on this ligand system and studied as PET probes [8, 9]. ONNO Ti(IV) complexes are structurally close to ONON Ti(IV) complexes, which exhibit much higher space flexibility because of the amino side arm [10]. However, only one report is related to the ONON Ti(IV) complex due to the difficult synthesis of ligands [10], no reports are found on the ONON Ti(IV) complexes containing a naphthalene moiety.

As shown in the Figure, the central Ti cation is seven-coordinated by three nitrogen atoms and four oxygen atoms, forming a distorted pentagonal bipyramidal geometry. The bond lengths of four Ti–O and three Ti–N bonds are ranging from 1.8390(12) to 2.0902(13) Å and from 2.1906(14) to 2.3891(15) Å, respectively, which is in accordance with the literature [7]. Surprisingly, the Mannich reaction of naphthalen-2-ol gave a rearranged ONON ligand L1, thus giving the titled ONON–Ti(IV) compound. The CH2Cl2 is disordered by an inversion center.

In the crystal packing, the molecules are linked together by some weak intermolecular interactions such as ππ and C–H⃛π. For instance, the centroid-to-centroid distance between two inversion-related C1–C6 aromatic rings is only 3.596(1) Å, indicating a ππ interaction.


Corresponding author: Tiankun Zhao, College of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, Gansu, P. R. China, E-mail:

Funding source: Natural Science Foundation of Gansu Province of China

Award Identifier / Grant number: 20JR5RA470

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: Natural Science Foundation of Gansu Province of China (Nos. 20JR5RA470).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

References

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Received: 2021-05-12
Accepted: 2001-06-08
Published Online: 2021-07-06
Published in Print: 2021-09-27

© 2021 Tiankun Zhao et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

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  61. The crystal structure of (2-(4-chlorophenyl)-5-methyl-1,3-dioxan-5-yl)methanol, C12H15ClO3
  62. The crystal structure of the co-crystal: 2-hydroxybenzoic acid – N′-(butan-2-ylidene)pyridine-4-carbohydrazide, C10H13N3O·C7H6O3
  63. Crystal structure and anti-inflammatory activity of (E)-7-fluoro-2-((5-methoxypyridin-3-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C17H14FNO2
  64. Crystal structure of (E)-7-fluoro-2-((6-methoxypyridin-3-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C17H14FNO2
  65. Crystal structure of 1,1′-(butane-1,4-diyl)bis(3-propyl-1H-imidazol-3-ium) bis(hexafluoridophosphate), C32H56F24N8P4
  66. The crystal structure of dichlorido-bis(3-methyl-3-imidazolium-1-ylpropionato-κ2)-cadmium(II), C14H20CdCl2N4O4
  67. Crystal structure of 1-(2-cyanobenzyl)-3-cyano-4-phenyl-4-(2-cyanobenzyl)-1,4-dihydropyridine monohydrate, C56H42N8O
  68. The crystal structure of 3-(carboxymethyl)-1-ethenyl-1H-imidazol-3-ium chloride, C7H9N2O2Cl
  69. The crystal structure of adamantylmethoxydiphenylsilane, C23H28OSi
  70. Redetermination of the crystal structure of (2E,4Z,13E,15Z)-3,5,14,16-tetramethyl-2,6,13,17-tetraazatricyclo[16.4.0.07,12]docosa-1(22),2,4,7,9,11,13,15,18,20-decaene, C22H24N4
  71. Crystal structure of (E)-7-hydroxy-2-((6-methoxypyridin-2-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C17H15NO3
  72. Crystal structure of catena-poly[diaqua-bis(μ2-1,3-di(1H-imidazol-1-yl)propane-κ2 N:N′)cobalt(II)] dinitrate, C18H28N10O8Co
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