The Crystal Structure of Calcium Cyanamide.

Syntheses, crystal structures, and vibrational spectroscopic properties of MgCN2, SrCN2, and BaCN2

“…Infrared spectra were recorded on a Bruker IFS 113 ν vacuum spectrometer equipped with two deuterated trigiycin sulfat (DTGS) detectors, measuring a range from 150 cm*" 1 to 4000 cm" 1 . MgCN 2 and SrCN 2 were measured as Csl pellets, BaCN 2 was mixed with KBr.…”

“…Nu merous synthetic routes have been proposed for metal cyanamides, however, their preparation in a pure and well-defined state has not been unambiguously achieved. Additionally, reliable structural data are only available for CaCN 2 [1].…”

In2.24(NCN)3 and NaIn(NCN)2: Synthesis and Crystal Structures of New Main Group Metal Cyanamides

“…2 W ell-grown single crystals of In 2 24(N C N )3 and N aIn (N C N )2 w ere m ou n ted on a four circle dif fracto m eter w here th eir crystal classes w ere con firm ed by axes photographs. C om plete sets of in tensities at room tem p eratu re were obtained betw een 5 -5 5° in 2 6 by speed-varying, prescand ep en d en t W yckoff scans.…”

“…The first crystal structure refinem ent with satisfying precision, however, seem s to be the w ork of V annerberg on calcium cyanam ide, C aN C N [2], yielding a linear Doc* shaped N C N 2-anion with a C -N bond dis tance of about 122(2) pm.…”

“…O n the industrial scale [3], C aN C N is m anufac tured from calcium carbide and m olecular n itro gen, while in the lab o rato ry m etal cyanam ides have been typically p rep ared via hig h -tem p eratu re routes (600 -1 3 0 0 °C) from the reaction b etw een carbonates and H C N gas, som etim es follow ed by a calcination process in a n itrogen atm o sp h ere [2], N ot too long ago, Pulham et al succeeded in syn thesizing lithium cyanam ide from a solid-state re action of Li2C2 with Li3N at 600 °C, finally crystal lizing it from liquid lithium [4]. The m ost recent synthetic strategy by B erger and Schnick [5], giving access to a nu m b er of alkaline-earth m etal cyana mides, involves a reaction betw een m etal nitrides and m elam ine C3N 3(N H 2)3 at ab o u t 800 °C.…”