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0342661071
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note
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2O was developed. Unfortunately, after coupling of the Boc-monoprotected 2,2′-bipyridine-3,3′-diamine with benzene-1,3,5-tricarbonyl trichloride and removal of the Boc group, a sparingly soluble triamine was obtained that could only be coupled with acid chloride 4b in low yields (5%).
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84944298854
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b) H. Meier, E. Praß, G. Zerban, F. Kosteyn, Z. Naturforsch. 1988, 43B, 889.
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Kosteyn, F.4
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22
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0343967177
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note
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ho phase is present in both compounds.
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23
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0343095389
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note
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Compounds 1b-c also show a concentration effect. Owing to their high molecular weights, the effect of change in concentration by weight is less pronounced than for 1a. Therefore, only the effects of concentration and temperature variations relating to 1a are discussed.
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24
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0342661065
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note
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Full details dealing with gel formation will be published elsewhere.
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25
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0343531323
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note
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The differences in the clearing temperatures obtained by DSC and polarisation microscopy are due to inefficient heat transfer at high temperatures in the heating element of the microscope.
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