Bromoderivatives of benzofused 1,2,5-thiadiazoles are important precursors for the synthesis dyes, which widely used to design effective photovoltaic materials. In this study, 4-bromobenzo[1,2-d:4,5-d′]bis([1,2,3]thiadiazole was selectively obtained from bromination benzo[1,2-d:4,5-d′]bis([1,2,3]thiadiazole. The structure newly synthesized compound established by means elemental analysis, high-...

Dibromoderivatives of benzofused chalcogen-nitrogen heterocycles are important precursors in the synthesis various photovoltaic materials. 4,7-Dibromobenzo[d][1,2,3]thiadiazole is a practically unexplored compound this series. In communication, it was shown that nucleophilic substitution 4,7-dibromobenzo[d][1,2,3]thiadiazole with morpholine gave selectively 4-substituted product—4-(7-bromobenzo...

Many problems can be formulated as search problems over a solution space S.17 That is, find the x 2 S such that some predicate P (x) is true. For example, hard problems such as the Hamiltonian path problem and Boolean satisfiability can be formulated this way. An unstructured search problem is a problem that makes no assumptions about the structure of the search space, or for which there is no ...

Information has now become such an integral part of our global society, that its access is considered as a basic human right [1, 2]. Moreover, progress of rural and urban developing populations is also getting increasingly dependent upon access to information [3]. This is specifically applicable to Pakistan, which is a developing country having GDP per capita about US$430, 67.7% rural populatio...