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The paper examined copyright as an enhancing tool for intellectual productivity in tertiary institutions in Niger State, Nigeria. The research design used is survey. Purposive (judgemental) sampling technique was used to select seven (7) out of 12 higher institutions of learning that are in Niger State. The institutions selected were picked on the basis of: their relevance to the study; students’ population; and years of establishment. The researchers used two (2) self-designed questionnaire instruments tagged “Enhancing intellectual productivity” to collect data for the study. The first instrument tagged “Enhancing intellectual productivity O” was administered to forty (40) copyright owners while the second instrument tagged “Enhancing intellectual productivity S” was administered to 700 students in the selected institutions. Statistical Package for Social Science (SPSS) was used to analyse the collected data. Part of the findings of the research is that violation of copyright through photocopying was more pronounced among the students in lower classes in all the institutions studied. Moreover, copyright holders are lopsided in the senior lectureship positions than in any other academic positions in the surveyed institutions. Moreover, 74.4% of the copyright holders affirmed that their work were involved in copyright abuse and that their work have suffered low sale due to illegal reprography in form of photocopying between 2009 and 2014. The study concluded that if properly handled, copyright would enhance intellectual productivity among right owners, researchers and inventors in higher institutions of learning and similar academic/ vocational organizations in Niger State and in Nigeria at large. It is recommended amongst other that intellectual property law should be made a core course in all higher institution in Nigeria and that all operators of photocopying centres should be made to open register for all photocopied items for adequate financial compensation to right owners. Key words: Copyright, intellectual productivity, tertiary institutions, Niger State, Nigeria.

Reaction of 2,6-diacetamidopyridine (2,6-dapyH 2 ) with mercury acetate in ethanol affords the 12-membered metallamacrocycle, [Hg 2 (μ-2,6-dapy) 2 ], in high yields resulting from deprotonation of both amide groups. The crystal structure shows that two 2,6-dapy dianions bridge the dimercury centre being bound through the amide nitrogens. The mercury atoms adopt the expected linear two-coordinate geometry [N–Hg–N 169.2 (4) and 173.5 (4)°] and the two 2,6-dapy ligands are twisted by ca. 19.3° with respect to one another. The metallamacrocycles form a coordination polymer with each mercury centre being weakly coordinated to two oxygen atoms of neighboring 2,6-dapy ligands [Hg⋯O 2.970 and 3.223 A].

Treatment of [MCl2(κ2-dppf)] (M = Pd or Pt) with two equivalents of potassium heterocyclic thionate salts (KL) affords mixed ligand complexes [ML2(κ2-dppf)] [L = 5-phenyl-1,3,4-oxadiazole-2-thionate (Phozt), 4,5-diphenyl-1,2,4-triazole-3-thionate (Ph2tzt), benz-1,3-thiazoline-2-thionate (bztzt) and benz-1,3-oxazoline-2-thionate (bzoxt)]. X-ray structures of two examples, [Pt(Phozt)2(κ2-dppf)] and [Pd(bzoxt)2(κ2-dppf)], show that the ligands are coordinated in a monodentate fashion via the sulfur atom.

Most printing presses in developing countries are located in buildings with inadequate natural and mechanical ventilation such that the press operators work for major hours in poor indoor air quality buildings, which expose them to a wide range of health hazards such as lead poisoning. Understanding how poor air quality affects the operator's body system is studied using a methodology involving the principle of diffusion and the law of mass action. A hypothetical press in Nigeria is used as a case study to illustrate the workability of the model, which may be of value to health inspectors to printing presses.