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+. +. 2 HCl. C 3 N 6 H 6. C 3 N 3 Cl 3. X-Ray Rietveld refinement of C 6 N 9 H 3 •HCl. C 3 N 4 graphitic derivatives: High-pressure “soft chemistry” syntheses. 1 GPa. 525 C. C 6 N 9 H 3 HCl.
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+ + 2 HCl C3N6H6 C3N3Cl3 X-Ray Rietveld refinement of C6N9H3•HCl C3N4 graphitic derivatives: High-pressure “soft chemistry” syntheses 1 GPa 525 C C6N9H3 HCl • By combining high-pressure techniques with “soft chemistry” synthetic strategies, we are now able to obtain bulk well-crystallized samples of C3N4 graphitic derivatives. In the above reaction, substituted CN heterocycle molecular precursors are polymerized at 1 GPa and 525 C to form the new layered C6N9H3HCl compound (hexagonal P63/m cell with a = 8.44 A and c = 6.43 A). This material represents the first well-crystallized example of a C-N network material in bulk form. • Similar reaction strategies are now being exploited in an attempt to synthesize the theoretically predicted dense low-compressibility forms of C3N4.