The New Encyclopaedia Britannica: Macropaedia (19 v.)Encyclopaedia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 83
... bonds to contract , and ( 2 ) the electrons that constitute the carbon - carbon bonds do not lie along the direct lines between the centres of the carbon atoms , but rather they bulge outward in the plane of the ring , so that the actual ...
... bonds to contract , and ( 2 ) the electrons that constitute the carbon - carbon bonds do not lie along the direct lines between the centres of the carbon atoms , but rather they bulge outward in the plane of the ring , so that the actual ...
Page 85
... bonds , has all four atoms ( carbon and the three atoms attached to it ) in a single plane , with three equal bond ... Bonds with this symmetry are referred to as a ( sigma ) bonds . The second electron pair , in order that it not occupy ...
... bonds , has all four atoms ( carbon and the three atoms attached to it ) in a single plane , with three equal bond ... Bonds with this symmetry are referred to as a ( sigma ) bonds . The second electron pair , in order that it not occupy ...
Page 88
... bonds , as , for example : H H CH , CH = CH , Br , CH , C - CH . alkali heat 2RC = CH + 102 cuprous salt RC = C - C = CR + H2O . Some hydrocarbons with triple bonds separated by single bonds occur in fungi and higher plants ; an example ...
... bonds , as , for example : H H CH , CH = CH , Br , CH , C - CH . alkali heat 2RC = CH + 102 cuprous salt RC = C - C = CR + H2O . Some hydrocarbons with triple bonds separated by single bonds occur in fungi and higher plants ; an example ...
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activity andesite Antarctic antibodies antigen atoms basalt basin bonds carbon cause cells centimetres central centre century chemical composition crystals cultural cycle cyclone earth economic effect eruption evaporation example feet feldspar feldspathoids flow freezing gabbro glaciers groundwater hallucinations heat hockey humidity Hungarian Hungary hydrocarbons hydrogen hydrograph hydrologic hydrologic cycle hypnosis Ibn Khaldun ice sheets icebergs Iceland ideology igneous rocks Illinois illusion immunoglobulin immunological important increase India industrial intrusive kilometres lakes land lava layers lymphocytes mafic magma major melting ment metres miles millimetres minerals molecules mountain North northern occur ocean parasitic percent philosophy plagioclase political population precipitation pressure produced pyroxene rainfall reaction region relatively result river runoff snow social soil specific square kilometres structure surface temperature theory tion types United vapour volcanic western wind zone