Novel hexamercaptotin: synthesis and characterization of [N(CH 3) 4] 2Sn(SH) 6 and [N(C 2H 5) 4] 2Sn(SH) 6 complexes

• Published in: Inorganic chemistry communications 2001-11, Vol.4 (11), p.643-647
• Main Authors: Dai, Jing-Cao, Wu, Li-Ming, Cui, Chuan-Peng, Fu, Zhi-Yong, Hu, Sheng-Min, Du, Wen-Xing, Zhang, Wen-Jian, Wu, Xin-Tao
• Format: Article
• Language: English
• Subjects: Crystal structure; Mercaptotin complex; Sn–SH bond energy; Stability
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/S1387-7003(01)00294-5

Mercaptotin complexes are difficult to synthesize since they are usually transient intermediates. Here, we report the synthesis and crystal structure of two examples of stable hexamercaptotin complexes [N(CH 3) 4] 2Sn(SH) 6 ( 1) and [N(C 2H 5) 4] 2Sn(SH) 6 ( 2), and discuss their stability by use of quantum chemistry method. Both the complexes 1 and 2 were obtained by hydrothermal synthesis and were crystallized in monoclinic space group, C2/m, Z=8, a=25.724(8), b=18.183(6), c=9.097(3) for 1, and C2/c, Z=4, a=14.0733(14), b=14.4018(14), c=13.2538(13) for 2. Single crystal X-ray diffraction analysis revealed that the Sn(IV) centers of 1 and 2 are octahedrally coordinated to six [SH] − ligands and all of the six hydrosulfuryl groups are located in terminal positions. The computational results of quantum chemistry method show that highly symmetric coordination of [SH] − ligands can be effective in stabilizing stannanethiols entities.