Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Ida Woodward"'
Publikováno v:
Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences. 185
X-ray measurements have been made of changes in the lattice spacings of Rochelle salt between —90 and +40° C. Rough visual estimates have also been made of changes in the intensities of X-ray reflexions with temperature. The thermal properties of
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 222:195-206
The isotope effect has been measured in acetylenedicarboxylic acid dihydrate. Comparisons have been made with oxalic acid dihydrate. Expansion of the crystals occurs on substituting deuterium for hydrogen. The relative magnitude of the effects corr
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 208:158-169
X-Ray measurements have been made on single crystals of caesium chloride from 20 to 469° C 495° C traversing the transition CsCl (b. c. c.) ⇌ 469°C CsCl (f. c. c.). Contrary to previously published statements which were all based on CsCl powder,
Autor:
J. Monteath Robertson, Ida Woodward
Publikováno v:
Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences. 162:568-583
A preliminary account of the crystal structure of stilbene in relation to other compounds in the dibenzyl series has already been given in Part III of this work (Robertson, Prasad and Woodward 1936). The general arrangement of the four molecules in t
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 181:415-427
Measurements have been made on the changes in lattice spacing of various phthalocyanines, over a range of temperatures from 90 to 600° K. Rough visual estimates have also been obtained of changes in the intensities of reflexions with rise in tempera
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 171:398-410
From the point of view of crystal structure the ordinary form of azobenzene definitely belongs to the dibenzyl series of structures, which have now been accurately determined (Robertson 1934, 1935; Robertson and Woodward 1937, 1938). This isomorphism
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 179:399-407
The isotope effect has been measured for (NH 4 )H 2 PO 4 . Expansion of the crystal lattice takes place on substituting deuterium for hydrogen. The expansion is in the direction of the hydrogen bonds, and is of the same magnitude as in the isomorphou
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 188:358-371
A low-temperature micro-thermostat is described, suitable for single-crystal X-ray work. Thermal expansions of KH 2 PO 4 (and in less detail of KH 2 AsO 4 ) have been measured by X-ray methods from room temperatures down to about 80° K. Both these c
Publikováno v:
Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences. 154:187-195
The first two parts of this work described a detailed quantitative analysis of the structure of dibenzyl, which crystallizes in the monoclinic system, space group C 5 2 h (P2 1 / a ), with two centro-symmetrical molecules in the unit cell. From preli
Autor:
Ida Woodward, J. Monteath Robertson
Publikováno v:
Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences. 164:436-446
The detailed structure of stilbene has recently been described (Robertson and Woodward 1937) and a theoretical discussion of the resonance problem in that type of molecule is now given by Penney and Kynch (1938). The crystal symmetry and dimensions o