Mononitration of durene

Reaction conditions under which the nitration of durene give predominantly, and in high yield, mononitrodurene (I), rather than dinitrodurene were found. The nitrating agent was No2+RF6-. Nitration with nitrosulfuric acid also gave mononitrodurene; however, byproducts such as 2.3.5.6-Me4C6HCH2C6H2Me3-2,4,5, were also formed. The NO2 PF6- gave an intermediate additional compound with durene. The reaction carried out with 3.6-dideuterodurene in D2O shows no isotope effect

Elatine lorentziana Hunz.

Sierra Grande (Falda E): La Gurisa, hacia el N de Ruta Nº 20, entre La Ollada y Pampa del MataderopublishedVersio

Cuscuta platyloba Progel var. pampeana Hunz.

Ruta Nacional Nº 3: Ea. Santa María., Pedro Luro, inmediaciones del Río ColoradopublishedVersio

Chenopodium quinoa var. lutescens Hunz.

Granja KcairapublishedVersio

Assumptions that imply quantum dynamics is linear

A basic linearity of quantum dynamics, that density matrices are mapped linearly to density matrices, is proved very simply for a system that does not interact with anything else. It is assumed that at each time the physical quantities and states are described by the usual linear structures of quantum mechanics. Beyond that, the proof assumes only that the dynamics does not depend on anything outside the system but must allow the system to be described as part of a larger system. The basic linearity is linked with previously established results to complete a simple derivation of the linear Schrodinger equation. For this it is assumed that density matrices are mapped one-to-one onto density matrices. An alternative is to assume that pure states are mapped one-to-one onto pure states and that entropy does not decrease.Comment: 10 pages. Added references. Improved discussion of equations of motion for mean values. Expanded Introductio

Agrostis ambatoensis Asteg.

Sierra de Ambato (Falda E, subiendo desde El Rodeo), cerca de la Cumbre del Cerro ManchadopublishedVersio

Capsicum eximium Hunz.

Jardín Botánico de la Faculad de Agronomía y Veterinaria, Universidad de Buenos Aires.publishedVersio

Nassella niduloides (Caro) Barkworth

Al pie del Champaqui, en las inmediaciones de la casa de T. DominguezpublishedVersio