The historical and the posthumous memoirs of Sir Nathaniel William Wraxall, 1772-1784; ed., with notes and additional chapters from the author's unpublished ms., by Henry B. Wheatley, F.S.A. ...

Reminiscences of royal and noble personages during the last and present centuries: v.5, p. [341]-396.

Activación de aldehídos a,b-insaturados mediante aminocatálisis en procesos enantioselectivos. Cicloadiciones (3+2) y reacciones en cascada Michael/Henry

During the research that it is summarized in the present memory, the activation of enals via iminium ion catalysis in different transformations has been studied. Firstly, a 1,3-dipolar cycloaddition between stable azomethine ylides and a,b-unsaturated aldehydes catalyzed by a chiral imidazolidinone derivative has been optimized. Employing this methodology we have synthesized a large range of densely substituted pyrroloisoquinolines and pyrrolophthalazines with good yields and high values of diastereo- and enantioselectivity. Moreover, a mechanistic study has been carried out based on DFT calculations and experimental data which have allowed us to propose that the (3+2) cycloaddition reaction follows a sequential Michael addition/Mannich cyclization pathway. The formation of the iminium ion as a result of the condensation between the a,b-unsaturated aldehyde and the catalyst plays an essential role, regarding both reactivity and stereoselectivity. On the other hand we have developed a methodology to carry out a cascade Michael/Henry reaction followed by a sequential dehydration. Starting from simple substrates (2-nitromethylacrilates and a,b-unsaturated aldehydes) and employing a prolinol-derivative catalyst a series of quiral nitrocyclohexadienes have been synthesized.

High harmonic generation by halogen anions and noble gas atoms in a laser field

A comparative study of high harmonic generation (HHG) by atoms and ions with active p-electrons is carried out in the theoretical framework of the rescattering mechanism. The substate with m(l) = 0, i.e. zero orbital momentum projection along the electric vector of a linearly polarized laser wave, is found to give the major contribution to the HHG rate. Our calculations for HHG by an H atom in an excited 2p-state demonstrate that the rate for recombination into a final state with a different value of m(l) (= +/- 1), is higher for lower harmonic orders N, while for higher N (beyond the plateau domain) the difference vanishes. For species with closed electron shells, the m(l)-changing transitions are forbidden by the Pauli exclusion principle. We report absolute HHG rates for halogen ions and noble gas atoms at various intensities. These results demonstrate that the Coulomb binding potential of the atoms considerably enhances both the ionization and recombination steps in the rescattering process. However, the weak binding energy of the anions allows lower orders of HHG to be efficiently produced at relatively low intensities, from which we conclude that observation of HHG by an anion is experimentally feasible.

La somptueuse et magnifique entrée du très-chrestien roy Henry III . de ce nom, roy de France & de Pologne,... en la cité de Mantoüe, avec les portraicts des choses les plus exquises, par B. D. Vig.re

[Entrée. Henri III (roi de France). [15??]. Mantoue]

« Statutz et ordonnances du très noble Ordre de Sainct-George, nommé la Jarretière, refourmés, explanés et déclayréz de nouveau par très hault, très excellent et très puissant prince Henry le huitiesme ».

En tête, sont les blasons coloriés de Saint-Georges et d'Angleterre et d'Anne de Montmorency. On lit au fol. 24 : « J'ay esté donné par le trez chrestien Louis treiziesme, roy de France et de Navarre, à Mre René de Chaumejan, chevallier, marquis de Fourille, conseiller du Roy en ses conseils et grand mareschal de ses logis ; en l'année mil six cens trente trois, ayant esté trouvé dans la bibliotèque de Chantilly, au premier voyage que Sa Majesté y fit, pour en prendre possession, après la mort de feu haut et puissant seigneur Messire Henry, duc de Montmorency, pair et mareschal de France, gouverneur et lieutenant-général pour le roy en Languedoc. »

Letter to Henry Nelles from S.B. Ritchie

Letter to Henry Nelles from S.B. Ritchie (1 page, double-sided) wondering what the prospects for the Welland Canal will be in the next season. This letter is somewhat stained. This does not affect the text. This is accompanied by an envelope, Feb. 3, 1834.