198 Topics in Current Chemistry Editorial Board: A. de Meijere KN ...

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Directional Aspects of Intermolecular Interactions 21 c b Fig. 13 b, c. b view in crystal structure; c comparison of the interactions in (b) and those in which conventional O-H◊◊◊N and N-H◊◊◊N hydrogen bonds are formed
22 J.P. Glusker 4.5 F◊◊◊H Interactions When fluorine is covalently bound to a carbon atom (a C-F bond) it is found that the fluorine atoms approach hydroxyl groups with minimum F◊◊◊H distances of 2.3 Å, much longer than O◊◊◊H distances of 1.4–1.7 Å in strong O◊◊◊HO hydrogen bonds [39–42]. The probability of O◊◊◊H-O hydrogen bond formation is significantly higher than that for the formation of a hydrogen bond involving a C-F group; thus O◊◊◊H-O hydrogen bonds will form wherever possible; rather than C-F◊◊◊H hydrogen bonds. Fluorine is the most electronegative element [26], and therefore it is interesting that C-F bonds rarely form hydrogen bonds, especially since the H◊◊◊F – interaction (involving a fluoride ion rather than organic fluorine) forms the shortest hydrogen bonds measured (H◊◊◊F – = 1.14 Å) [29]. Some C-H◊◊◊F interactions in a fluoro PAH are shown in Fig. 14. a b Fig. 14 a, b. A fluorinated PAH showing C-H◊◊◊F interactions [113]. The compound is 11-(trifluoromethyl)-15,16-dihydrocyclopenta[a]phenanthren-17-one. Two examples of interactions between molecules are shown in (a) and (b). They both involve C-H◊◊◊F interactions. H◊◊◊F and H◊◊◊O nonbonded distances are given in Å
Page 1 and 2: 198 Topics in Current Chemistry Edi
Page 3 and 4: Design of Organic Solids Volume Edi
Page 5 and 6: Volume Editors Prof. Dr. Edwin Webe
Page 7 and 8: VIII preface tion at an amazing lev
Page 9 and 10: Contents of Volume 196 Carbon Rich
Page 11 and 12: 2 J.P. Glusker 5 Interactions of Pl
Page 13 and 14: 4 J.P. Glusker Perturbations to the
Page 15 and 16: 6 J.P. Glusker 2.1 Sources of Cryst
Page 17 and 18: 8 J.P. Glusker other induced, will
Page 19 and 20: 10 J.P. Glusker The forces here hav
Page 21 and 22: 12 J.P. Glusker lographic structure
Page 23 and 24: 14 J.P. Glusker a c Fig. 6 a - c. D
Page 25 and 26: 16 J.P. Glusker hydrogen bond H◊
Page 27 and 28: 18 J.P. Glusker Fig. 9. Citric acid
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Page 59 and 60: 50 J.P. Glusker Fig. 39. Hydrogen-b
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74 A. Nangia · G.R. Desiraju and r
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76 A. Nangia · G.R. Desiraju bonds
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90 A. Nangia · G.R. Desiraju b c F
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92 A. Nangia · G.R. Desiraju all a
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94 A. Nangia · G.R. Desiraju 42. J
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Hydrogen-Bonded Ribbons, Tapes and
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132 Y. Aoyama 4 Catalysis . . . . .
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134 Y. Aoyama 2.2 Symmetry-Controll
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136 Y. Aoyama A trigonal centre is
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138 Y. Aoyama 18 19 Fig. 5. 2D net
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140 Y. Aoyama 24 ded (O-H◊◊◊O
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142 Y. Aoyama 2.4 Interaction-Suppo
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144 Y. Aoyama In the presence of a
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146 Y. Aoyama clusion compounds (se
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148 Y. Aoyama are intriguing guests
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150 Y. Aoyama The tuning or enginee
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152 Y. Aoyama Fig. 16. Binding isot
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154 Y. Aoyama The desorption of the
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156 Y. Aoyama Fig. 17. Suggested me
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158 Y. Aoyama 5 Concluding Remarks
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160 Y. Aoyama 4. Hölderich W, Hess
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Crystalline Polymorphism of Organic
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Author Index Volumes 151-198 Author
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Author Index Volumes 151 - 198 2 1
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Author Index Volumes 151 - 198 213
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Author Index Volumes 151 - 198 2 ]
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Springer and the environment At Spr
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198 Topics in Current Chemistry Editorial Board: A. de Meijere KN ...

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