1, 3-Benzodioxane

Cover Vol.3, No.1, April 2006

Ab Initio Study of Conformational and Configurational Properties of 1, 3- Diazacyclohepta-1, 2-diene and 1, 3-Diazacycloocta-1, 2-diene

Ab initio calculations at HF/6-31G* level of theory for geometry optimization and MP2/6-31G*//HF/6-31G* for a single point total energy calculation are reported for the importantenergy-minimum conformations and transition-state geometries of 1, 3-diazacyclohepta-1, 2-diene (2) and 1, 3-diazacycloocta-1, 2-diene (3). The C2 symmetric twist-chair (2-TC)conformation of 2 is calculated to be 7.4 kJ...

2 3 1 1 1 0 0 0 0 1 1 1 2 3 1 2 3 1 3 2 2 3 Adjacency matrix Adjacency list

Graphs and Digraphs: A graph G = (V,E) is a structure that represents a discrete set V objects, called vertices or nodes, and a set of pairwise relations E between these objects, called edges. Edges may be directed from one vertex to another or may be undirected. The term “graph” means an undirected graph, and directed graphs are often called digraphs (see Fig. 1). Graphs and digraphs provide a...

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We present a component-based framework and its supporting simulation tool for joint software-hardware modelling and performance analysis of multiprocessor embedded systems. This joint evaluation enables predicting the impact of hardware configuration on software performance and hardware capability to accommodate other services at design time. The experiments carried out on several reallife indu...

سنتز 1، 3، 5، 7-تترا استیل-1، 3، 5، 7-تترا آزاسیکلواکتان (TAT) از طریق استیل‌دار کردن 3، 7-دی‌استیل-1، 3، 5، 7-تترا آزا بی‌سیکلو-[3.3.1]-نونان (DAPT)

In this study, a novel method to synthesis of 1,3,5,7-tetraacetyl octahydro-1,3,5,7-tetraazocine or 1,3,5,7-tetraacetyl-1,3,5,7-tetraazacyclooctane (TAT) was used through acetolysis of 3,7-diacetyl-1,3,5,7-tetraazabicyclo-[3.3.1]nonane (DAPT) with acetic anhydride in the presence of sodium acetate as catalyst. Optimized reaction conditions were obtained by changing temperature, time and startin...