Cyclolinear Oligo- and Poly(iminoborane)s: The Missing Link in Inorganic Main-Group Macromolecular Chemistry
作者:Ozan Ayhan、Nicolas A. Riensch、Clemens Glasmacher、Holger Helten
DOI:10.1002/chem.201705913
日期:2018.4.17
with dichloro‐ or dibromoboranes 2 or 8, respectively. Silicon/boron exchange polycondensation led to oligo(iminoborane)s 11 a,b,ac,d. Alternative synthetic routes to such species involve Sn/B exchange of 1,3‐bis(trimethylstannyl)‐2‐n‐octyl‐1,3,2‐diazaborolidine (16) and n‐C8H17BBr2 (8 a), and the initiated polycondensation of the dormant monomer 14 in the presence of a Brønsted acid (HCl, HOTf, or HNTf2;
的反应Ñ -C 8 ħ 17 B [N(Me)的森达3 ] 2(1)配有Ñ -C 8 ħ 17的BCl 2(2)得到,而不是直链的聚(iminoborane)时,氨基硼烷Ñ - C 8 H 17 B(Cl)N(Me)SiMe 3(4)和环三聚化后的硼嗪环-(n C 8 H 17 BNMe)3(6)。如果分别将1,3-双(三甲基甲硅烷基)-1,3,2-二氮杂硼烷核苷7与二氯或二溴硼烷2或8一起用作共聚单体,则可有效抑制导致硼嗪形成的副反应。硅/硼交换缩聚导致低聚(亚氨基硼烷)s 11 a,b,ac,d。此类物种的替代合成路线涉及1,3-双(三甲基锡烷基)-2 - n-辛基-1,3,2-二氮杂硼烷(16)和n- C 8 H 17 BBr 2(8 a的Sn / B交换),并在布朗斯台德酸(HCl,HOTf或HNTf 2; Tf =三氟甲基磺酰基)的存在下引发休眠单体14的缩聚反应。尽管尝试获得带