Home Physical Sciences Crystal structure of guanidinium tetrapropylammonium bis(hydrogencarbonate) dihydrate, C15H40N4O8
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Crystal structure of guanidinium tetrapropylammonium bis(hydrogencarbonate) dihydrate, C15H40N4O8

  • Huahui Zeng , Qianjin Shen and Xiangxiang Wu EMAIL logo
Published/Copyright: September 8, 2018

Abstract

C15H40N4O8, monoclinic, Cc (no. 9), a = 25.986(3) Å, b = 8.3450(6) Å, c = 21.1358(15) Å, β = 90.877(6)°, V = 4582.9(6) Å3, Z = 8, Rgt(F) = 0.0357, wRref(F2) = 0.0916, T = 296(2) K.

CCDC no.: 1862438

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

Table 1:

Data collection and handling.

Crystal:Colorless plate
Size:0.38 × 0.16 × 0.05 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:0.09 mm−1
Diffractometer, scan mode:APEX2, φ and ω
θmax, completeness:23.7°, >99%
N(hkl)measured, N(hkl)unique, Rint:8322, 4217, 0.019
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 3517
N(param)refined:523
Programs:SHELX [1, 2] , Bruker [3]
Table 2:

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

AtomxyzUiso*/Ueq
O10.26820(10)−0.0439(3)0.09179(12)0.0720(7)
H10.2891(15)−0.095(5)0.117(2)0.108*
O1W0.17440(12)0.6009(3)0.20479(13)0.0707(7)
H1WA0.1627(19)0.612(5)0.2425(11)0.106*
H1WB0.1867(18)0.693(3)0.195(2)0.106*
N10.04595(11)0.7994(3)0.01959(13)0.0502(7)
C1−0.00372(14)0.7119(4)0.03113(18)0.0567(9)
H1A−0.01240.6506−0.00650.068*
H1B0.00210.63610.06530.068*
O20.19009(10)0.0554(3)0.09360(11)0.0655(7)
O2W0.13140(11)0.6658(5)−0.36468(18)0.0973(10)
H2WA0.1478(18)0.744(4)−0.380(3)0.146*
H2WB0.1520(16)0.593(5)−0.352(3)0.146*
N2−0.19118(11)1.1797(3)0.77811(13)0.0471(6)
C2−0.04944(17)0.8138(5)0.0475(2)0.0770(12)
H2A−0.05490.89430.01500.092*
H2B−0.04290.86850.08740.092*
O30.21937(10)−0.0886(3)0.17489(12)0.0702(7)
C3−0.09696(17)0.7109(7)0.0529(2)0.0890(14)
H3A−0.12580.77700.06340.133*
H3B−0.10360.65800.01330.133*
H3C−0.09160.63220.08550.133*
O3W0.37202(12)0.1012(5)−0.11960(14)0.0940(10)
H3WA0.372(2)0.145(6)−0.1563(14)0.141*
H3WB0.3970(15)0.035(5)−0.116(2)0.141*
N30.28407(13)0.0776(4)−0.04013(16)0.0777(10)
H3D0.28330.0383−0.00250.093*
H3E0.31180.0721−0.06160.093*
C40.06118(15)0.8990(4)0.07693(16)0.0558(9)
H4A0.09230.95760.06720.067*
H4B0.03430.97720.08420.067*
O4W0.06654(13)0.6502(5)−0.25316(18)0.1129(12)
H4WA0.0948(15)0.667(7)−0.273(3)0.169*
H4WB0.061(2)0.549(3)−0.259(3)0.169*
N40.24370(13)0.2051(4)−0.12278(15)0.0691(9)
H4C0.21670.2488−0.13920.083*
H4D0.27150.1994−0.14420.083*
O40.15079(12)0.3434(4)−0.17025(13)0.0825(8)
C50.07044(16)0.8069(4)0.13744(17)0.0639(10)
H5A0.10010.73760.13280.077*
H5B0.04080.74010.14610.077*
N50.20037(13)0.1544(4)−0.03166(15)0.0693(9)
H5C0.17310.1979−0.04760.083*
H5D0.20000.11600.00610.083*
O50.06988(13)0.4249(5)−0.16358(16)0.1065(12)
C60.07965(18)0.9213(5)0.19207(18)0.0758(12)
H6A0.08550.86120.23030.114*
H6B0.10930.98630.18370.114*
H6C0.05010.98880.19690.114*
N60.01729(12)0.6958(3)−0.40152(15)0.0626(8)
H6D0.04550.6882−0.37990.075*
H6E0.01780.6902−0.44210.075*
O60.10500(11)0.2749(4)−0.08837(13)0.0765(8)
H60.0760(11)0.291(6)−0.071(2)0.115*
C70.08630(14)0.6728(4)0.00641(18)0.0552(9)
H7A0.08730.59810.04160.066*
H7B0.07570.6134−0.03100.066*
N7−0.06954(12)0.7299(4)−0.40657(17)0.0736(9)
H7C−0.09840.7448−0.38820.088*
H7D−0.06850.7242−0.44720.088*
O70.01666(10)0.3090(3)−0.03477(12)0.0679(7)
C80.13982(16)0.7357(6)−0.0035(2)0.0802(12)
H8A0.13950.8089−0.03920.096*
H8B0.15090.79510.03370.096*
N8−0.02793(12)0.7246(4)−0.31044(15)0.0693(8)
H8C0.00010.7171−0.28850.083*
H8D−0.05680.7378−0.29180.083*
O8−0.02207(11)0.4235(4)−0.11735(14)0.0883(9)
H80.0089(10)0.427(7)−0.131(3)0.132*
C90.17736(18)0.6027(6)−0.0157(2)0.0919(14)
H9A0.21100.6470−0.02180.138*
H9B0.17830.53110.01990.138*
H9C0.16680.5449−0.05290.138*
O9−0.06723(12)0.3627(4)−0.03617(14)0.0941(10)
C100.04008(17)0.9141(4)−0.03604(17)0.0626(10)
H10A0.01580.9972−0.02460.075*
H10B0.07300.9655−0.04290.075*
O10−0.12304(10)0.2705(3)0.25737(12)0.0686(7)
C110.0222(2)0.8402(5)−0.09755(18)0.0844(13)
H11A0.04780.7645−0.11190.101*
H11B−0.00960.7820−0.09090.101*
O11−0.15950(10)0.3275(4)0.16466(13)0.0773(8)
C120.0135(3)0.9648(6)−0.1470(2)0.122(2)
H12A0.00220.9146−0.18560.183*
H12B−0.01221.0388−0.13310.183*
H12C0.04511.0214−0.15410.183*
O12−0.20531(9)0.3268(3)0.25178(11)0.0579(6)
H12−0.2299(12)0.353(5)0.2252(17)0.087*
C13−0.20440(14)1.0742(4)0.72163(15)0.0531(8)
H13A−0.17501.00650.71300.064*
H13B−0.23271.00460.73300.064*
C14−0.21912(16)1.1622(4)0.66153(16)0.0618(10)
H14A−0.25141.21820.66730.074*
H14B−0.19291.24100.65190.074*
C15−0.2245(2)1.0455(5)0.60743(19)0.0838(12)
H15A−0.23381.10240.56950.126*
H15B−0.19240.99120.60150.126*
H15C−0.25070.96840.61690.126*
C16−0.23471(14)1.2950(4)0.79196(17)0.0522(9)
H16A−0.22461.35990.82810.063*
H16B−0.23881.36650.75610.063*
C17−0.28614(15)1.2209(5)0.8053(2)0.0705(11)
H17A−0.28321.15150.84200.085*
H17B−0.29721.15620.76950.085*
C18−0.32542(18)1.3491(6)0.8174(2)0.0919(14)
H18A−0.35801.30030.82590.138*
H18B−0.31471.41210.85320.138*
H18C−0.32861.41680.78080.138*
C19−0.18125(16)1.0690(4)0.83360(16)0.0586(9)
H19A−0.21211.00640.84040.070*
H19B−0.15420.99480.82220.070*
C20−0.1660(2)1.1481(5)0.89538(19)0.0788(12)
H20A−0.13481.20980.88960.095*
H20B−0.19301.22120.90800.095*
C21−0.1572(2)1.0264(6)0.9462(2)0.1031(16)
H21A−0.14761.07950.98490.155*
H21B−0.18830.96640.95230.155*
H21C−0.13020.95500.93400.155*
C22−0.14388(14)1.2812(4)0.76450(18)0.0553(9)
H22A−0.15191.34930.72850.066*
H22B−0.13761.35070.80060.066*
C23−0.09506(16)1.1932(6)0.7510(3)0.0903(14)
H23A−0.10061.12080.71570.108*
H23B−0.08501.12980.78770.108*
C24−0.05293(18)1.3086(7)0.7357(2)0.0986(15)
H24A−0.02191.25030.72720.148*
H24B−0.06271.37020.69910.148*
H24C−0.04711.37910.77100.148*
C250.22351(14)−0.0254(4)0.12147(16)0.0519(8)
C260.10875(18)0.3516(5)−0.14343(19)0.0690(11)
C27−0.02480(17)0.3602(5)−0.05995(19)0.0620(10)
C28−0.16055(15)0.3076(4)0.22337(18)0.0542(9)
C290.24250(16)0.1467(4)−0.06488(18)0.0574(9)
C30−0.02670(14)0.7160(4)−0.37248(18)0.0544(9)

Source of material

1,2,4,5-tetrakis(4-carboxyphenyl)benzene and tetrapropylammonium hydroxide (30% aqueous solution) were dissolved in small amount of water/ethanol (v/v, 1:2) to yield clean solution with the participation of guanidine hydrochloride (A. R.). After vigorous stirring for an hour, the solution was set aside to generate colorless plate crystals of the title compound after about 2 weeks. The aromatic acid was not present in the obtained crystalline phase. It can be concluded that bicarbonate should be derived from carbon dioxide during the stirring process.

Experimental details

Hydrogen atoms cound to carbon and nitrogen atoms are introduced by a riding model. The coordinates of the hydrogen atoms at water molecules are refined freely. Uiso parameters are fixed for all hydrogen atoms.

Comment

A guanidinium cation is a perfect triangular potentially hydrogen-bonded motif due to its planar configuration and multiple –NH2 groups. Obviously, if another hydrogen-bond acceptor can be provided to cooperate with guanidine/guanidinium, it can generate interesting hydrogen bonding schemes. The bicarbonate is clearly a good choice to interact with guanidine/guanidinium, because it can be regarded as excellent hydrogen bond donor and acceptor. In the related crystal structures involving aromatic acids and tetraalkylammonium ions [4], [5], [6], [7], it can be found these two ions were often used to construct hydrogen-bonded frameworks, but the title compound and its structure has not been reported before.

In the asymmetric unit of the title compound, there are four independent bicarbonate ions, four water molecules, two guanidine ions and two tetrapropylammonium cations. Observing the structure, it can be found that each two bicarbonate ions firstly connect with each other to form the dimer by the intermolecular O—H⋯O interactions, then the dimers link with two guanidine ions and four water molecules to yield the three-dimensional framework with cavities by different O—H⋯O and N—H⋯O contacts. To obtain the stable crystal structure, those cavities are filled with tetrapropylammonium cations to form the close-packed structure. Apparently, although guanidine and bicarbonate are very simple molecules, they still can construct complicated hydrogen-bonded network with the suitable conditions. Bond lengths and angles in the ions are all in the expected ranges [8].

Acknowledgements

This work was financially supported by Natural Science Foundation of China (21601053, U1604185) and Scientific and Technological Brainstorm Project of Henan Province (182102410012).

References

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Received: 2018-04-09
Accepted: 2018-08-16
Published Online: 2018-09-08
Published in Print: 2018-11-27

©2018 Huahui Zeng et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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