Muutke küpsiste eelistusi

E-raamat: Modeling Marvels: Computational Anticipation of Novel Molecules

  • Formaat: PDF+DRM
  • Ilmumisaeg: 05-Dec-2008
  • Kirjastus: Springer-Verlag New York Inc.
  • Keel: eng
  • ISBN-13: 9781402069734
  • Formaat - PDF+DRM
  • Hind: 110,53 €*
  • * hind on lõplik, st. muud allahindlused enam ei rakendu
  • Lisa ostukorvi
  • Lisa soovinimekirja
  • See e-raamat on mõeldud ainult isiklikuks kasutamiseks. E-raamatuid ei saa tagastada.
  • Formaat: PDF+DRM
  • Ilmumisaeg: 05-Dec-2008
  • Kirjastus: Springer-Verlag New York Inc.
  • Keel: eng
  • ISBN-13: 9781402069734

DRM piirangud

  • Kopeerimine (copy/paste):

    ei ole lubatud

  • Printimine:

    ei ole lubatud

  • Kasutamine:

    Digitaalõiguste kaitse (DRM)
    Kirjastus on väljastanud selle e-raamatu krüpteeritud kujul, mis tähendab, et selle lugemiseks peate installeerima spetsiaalse tarkvara. Samuti peate looma endale  Adobe ID Rohkem infot siin. E-raamatut saab lugeda 1 kasutaja ning alla laadida kuni 6'de seadmesse (kõik autoriseeritud sama Adobe ID-ga).

    Vajalik tarkvara
    Mobiilsetes seadmetes (telefon või tahvelarvuti) lugemiseks peate installeerima selle tasuta rakenduse: PocketBook Reader (iOS / Android)

    PC või Mac seadmes lugemiseks peate installima Adobe Digital Editionsi (Seeon tasuta rakendus spetsiaalselt e-raamatute lugemiseks. Seda ei tohi segamini ajada Adober Reader'iga, mis tõenäoliselt on juba teie arvutisse installeeritud )

    Seda e-raamatut ei saa lugeda Amazon Kindle's. 

The aim of this book is to survey a number of chemical compounds that some chemists, theoretical and experimental, find fascinating. Some of these compounds, like planar carbon species or oxirene, offer no obvious practical applications; nitrogen oligomers and polymers, in contrast, have been touted as possible high-energy-density materials. What unites this otherwise eclectic collection is that these substances are unknown and offer a challenge to theory and to synthesis.



That such a challenge exists is in some cases almost obvious to most chemists. The instability of nitrogen polymers, for example, might be taken nearly as an axiom, to be quantified, but not refuted by computations and to be subjected to an almost superfluous (but rather challenging) validation by synthesis. On the other hand, oxirene, the unsaturated relative of the prosaic oxirane, presents no immediately obvious oddity, yet this molecule has defied all attempts at synthesis and remains a theoretical conundrum, in that it is not certain if it can even exist!



It is hoped that this collection of idiosyncratic molecules will appeal to chemists who find the study of chemical oddities interesting and, on occasion, even rewarding.



"A great romp through imagined molecules, a challenge to the talents of synthetic chemists! Errol Lewars leads us expertly through a wonderland of the chemical imagination, fascinating molecular structures that do not (yet) exist!" Prof. Roald Hoffmann - Nobel Laureate, Chem. 1981- Cornell University, New York, USA









"This book is an educational and enjoyable read, devoted to species on the fringes of chemical, calculation and conceptual plausibility" Prof. Joel Liebman, University of Maryland, Baltimore County, USA
1 Planar Carbon
1
Introduction
1
Dimethanospiro[ 2.2]octaplane: A Computational Saga
3
Synthesis
9
Conclusions
10
Notes
11
References
11
2 Pyramidal Carbon
13
Introduction
13
Pyramidane
14
Other Molecules with Possibly Pyramidal Carbon
24
Synthesis
25
Conclusions
27
Notes
27
References
29
3 Oxirene
31
Introduction
31
The Oxirene Problem: History
33
Oxirenes to 1981; Summary
33
Oxirenes After 1981
39
Synthesis
49
Conclusions
50
Notes
50
References
50
4 Nitrogen Pentafluoride and Related Compounds
53
Introduction
53
Nitrogen Pentafluoride, the Octet Rule, and Hypervalency
53
The Predicted Properties of NF5
59
Related Nitrogen Compounds
61
Hypercoordinate Compounds of Other Nonmetals
62
Synthesis
62
Conclusions
63
Notes
64
References
64
5 Helium Compounds
67
Introduction
67
Overview of the Chemistry of Neon, Argon, Krypton, Xenon, (Radon)
67
Helium Compounds
71
Synthesis
77
Notes
78
References
78
6 Tetrahedrane
81
Introduction
81
Counterfeit Chemistry: A Fictional Synthesis of a Tetrahedrane
82
Real Syntheses of Tetrahedranes
83
Tetra-t-butyltetrahedrane, Synthesis
83
Tetra-t-butyltetrahedrane, Properties
85
Tetrakis(trimethylsilyl)tetrahedrane, Synthesis
87
Tetrakis(trimethylsilyl)tetrahedrane, Properties
87
Tetrahedranyllithium (and Compounds Derived Therefrom)
90
Tetra t-butyltetrahedrane, B3LYP/6-31G* Calculations
94
Tetrakis(trimethylsilyl)tetrahedrane, B3LYP/6-31G* Calculations
94
The Parent Tetrahedrane, Calculations
94
Some Calculated Properties of Tetrahedrane
96
Synthesis
100
Notes
101
References
102
7 Orthogonene
105
Introduction
105
Orthogonenes 1 and 4
107
Synthesis
110
Conclusions
112
Notes
112
References
113
8 Hexaphenylethane
115
Introduction
115
Hexaphenylethane: The Classical Period
115
Hexaphenylethane: The Modern Period
118
Synthesis
123
A Related Compound
126
Conclusions
128
Notes
128
References
129
9 Ethenedione, C2O2
131
Introduction
131
Electronic Structure and Stability of Ethenedione
131
Attempts to make Ethenedione
133
Species Related to Ethenedione
135
Synthesis
137
Conclusions
138
Notes
138
References
139
10 Nitrogen Oligomers and Polymers: Superfuels or Chimeras? 141
Introduction
141
Experimental Results
142
Theoretical Results
148
Cyclic N8 Molecules
148
Cyclic N6 Molecules
151
Cyclic N4 Molecules
155
Cyclic Polynitrogens with Several Rings
156
Acyclic Molecules
156
Some "Conventional" Polynitrogens
157
Synthesis
159
Conclusions
159
Notes
160
References
160
11 Oligomers and Polymers of Carbon Dioxide and CO2/N2 165
Introduction
165
CO2 Compounds
165
CO2–N2 Compounds
171
Structures (B3LYP/6-31G*) of the CO2–N2 Compounds (Fig. 11.5)
175
Decomposition Reactions (B3LYP/6-31G* and MP2/6-31G*) of the Cyclic CO2–N2 Compounds (Fig. 11.6)
175
The B3LYP/6-31G* Reaction Profiles (Fig. 11.6)
175
The MP2/6-31G* Reaction Profiles (Fig. 11.7)
178
Stability of the Acyclic CO2–N2 Compounds 13a, 13b, 13c
178
Synthesis
180
The CO2 Compounds
180
The CO2 - N2 Compounds
180
Summary
182
The CO2 Dimer etc., Stability
182
The CO2–N2 Dimer etc., Stability
183
Synthesis
183
Notes
183
References
183
12 Polyprismanes. Flights of Fun and Fancy 185
Introduction
185
Simple Prismanes
187
Polyprismanes
192
Some Computed Properties of Polyprismanes
201
Strain
202
Thermodynamic Stability
204
Kinetic Stability
209
Two Simple Reactions: Attack by a Hydride Ion and by a Proton
213
Other Candidates for Half-Planar or Linear C–C–C Carbons
218
Some Other Rodlike Molecules: Carbon Nanotubes, Staffanes, Ladderanes
220
Polyprismanes: Synthesis
222
Conclusions
224
Notes
224
References
224
13 A Menagerie of Molecules from Michl and Balaji: Superstrained Molecules 227
Introduction
227
Molecules 1, 2, and 3 (Known Species)
227
Molecules 4, 5, 6, 7 (Unknown Species)
235
A Comparative Survey of some Salient Characteristics of 1-7: Geometry, Strain, Ionization Energies, and IR and Electronic Spectra
243
Synthesis
249
Conclusions
253
Notes
253
References
254
14 Summary 257
Introduction
257
Our Medley of Molecules, Arranged by Common Themes
258
Metamedley
270
Notes
272
References
272
Index 275