Chlorocadmate(II) salts of two 1,2,4-triazolo-[1,5-a]pyrimidine derivatives

详细信息	查看全文 | 推荐本文 |

• 作者：Carmen R. Maldonado ; Miguel Quiró ; s ; Juan M. Salas
• 关键词：Triazolopyrimidine ; Cadmium ; Polymeric anion ; Catena-tri-μ ; -chlorocadmate(II) ; Tetrachlorocadmate(II)
• 刊名：Journal of Molecular Structure
• 出版年：2008
• 期刊代码：62_00222860
• 类别：ch
• 出版时间：30 June 2008
• 卷：882
• 期：1-3
• 页码：30-34
• 文件大小：177 K

摘要

The crystal structure of the ionic compounds (tpH)_n[Cd_nCl_3n] and (dmtpH)₂[CdCl₄] · 2H₂O is described, where tp = 1,2,4-triazolo-[1,5-a]pyrimidine and dmtp = 5,7-dimethyl-1,2,4-triazolo-[1,5-a]pyrimidine. Both compounds are monoclinic, space groups P2₁/c and C2/c, respectively. Unit cell parameters are a = 13.7860(7), b = 9.4013(5), c = 17.6679(9) Å, β = 98.672(1)° for the first compound and a = 11.7543(7), b = 12.6823(7), c = 6.6836(4) Å, β = 96.710(1)° for the second. In both cases, the heterocycles are protonated at the nitrogen atom at position 3. For dmtp, the charge of the cation is neutralized by the simple tetrahedral [CdCl₄]²⁻ anion, whereas for tp, a polymeric [Cd_nCl_3n]ⁿ⁻ anion is present, formed by aligned face-sharing CdCl₆ octahedra.