Influence of N–H–O hydrogen bonds on the structure and properties of (K1−x(NH4)xH2PO4) proton glasses: a single crystal neutron diffraction study

2013 ◽  
Vol 25 (7) ◽  
pp. 075902 ◽  
Author(s):  
Rajul Ranjan Choudhury ◽  
R Chitra
Author(s):  
H. Ptasiewicz-Bak ◽  
R. Tellgren ◽  
I. Olovsson ◽  
A. Koll

AbstractThe crystal structure of 2-(N,N-diethylamino-N-oxymethyl)-4,6-dichlorophenol contains two slightly different molecules A and B, both with very strong intramolecular O … H … O hydrogen bonds, with O–O distances 2.423(4) Å and 2.400(5) Å, respectively, and with no crystallographic symmetry. The bridging oxygen atoms are also chemically different, O1 is bonded to carbon and O2 to nitrogen. The single crystal neutron diffraction study shows quite unambiguously that the proton in both cases is located slightly off-centred. In the A molecule O1–H = 1.167(6) Å, H–O2 = 1.258(6) Å and the angle O–H–O = 175.8(5)°; in the B molecule O1–H = 1.186(7) Å, H–O2 = 1.214(7) Å and the angle O–H–O = 176.5(5)°. As expected the proton is thus closer to the centre in the slightly shorter hydrogen bond.


2018 ◽  
Vol 46 (5) ◽  
pp. 449-458
Author(s):  
G. Diego Gatta ◽  
Pietro Vignola ◽  
Nicola Rotiroti ◽  
Martin Meven

2019 ◽  
Vol 104 (1) ◽  
pp. 73-78 ◽  
Author(s):  
G. Diego Gatta ◽  
Ulf Hålenius ◽  
Ferdinando Bosi ◽  
Laura Cañadillas-Delgado ◽  
Maria Teresa Fernandez-Diaz

2015 ◽  
Vol 632 ◽  
pp. 563-567 ◽  
Author(s):  
Galina Abramova ◽  
Juerg Schefer ◽  
Nadir Aliouane ◽  
Martin Boehm ◽  
German Petrakovskiy ◽  
...  

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