The extremely bulky aryl/silyl secondary amines, HN(Ar)(SiMe3), Ar = C6H2-i-Pr2(CPh3)-2,6,4 (LDipH), C6H2C(H)Ph2}2-i-Pr-2,6,4 (L†H), or C6H2C(H)Ph2}2-t-Bu-2,6,4 (Lt-BuH), have been synthesized via salt metathesis reactions between the appropriate lithium anilide complex and ClSiMe3. The related diaryl secondary amines, HN(Ar*)(R), Ar* = C6H2C(H)Ph2}2Me-2,6,4 and R = C6H3Me2-3,5 (LMeH), C6H3(CF3)2-3,5 (LCF3H), or C6H2-i-Pr3-2,4,6 (LTripH), were prepared via palladium catalyzed cross-coupling reactions. Three of the amines were crystallographically characterized. Treatment of GeCl2·dioxane with 1 equiv. of each of the deprotonated amines led to the isolation of the amido-germanium(II) chloride complexes, [LGeCl] (L = L†, Lt-Bu, LCF3, or LTrip). Similarly, reaction of the known amido-digermyne, [L*Ge–GeL*] (L* = –N(Ar*)(SiMe3)), with I2 resulted in the oxidative cleavage of the Ge–Ge bond of the digermyne, and the formation of the first two-coordinate amido-germanium(II) iodide complex, [L*GeI]. Crystallographic characterization of [Lt-BuGeCl] and [L*GeI] revealed both to have similar monomeric structures. The compounds described in this study should prove useful as synthons for synthetic chemists working in the field of low oxidation state main group chemistry.
极为庞大的芳基/
硅基二级胺,HN(Ar)(SiMe3),其中Ar =
C6H2-i-Pr2(
CPh3)-2,6,4 (LDipH), C(H)Ph2}2-i-Pr-2,6,4 (L†H),或 C(H)Ph2}2-t-Bu-2,6,4 (Lt-BuH),已通过适当的
锂苯胺配合物与ClSiMe3之间的盐转化反应合成。相关的二芳基二级胺,HN(Ar*)(R),其中Ar* = C(H)Ph2}2Me-2,6,4,R = Me2-3,5 (LMeH),
C6H3(
CF3)2-3,5 (L H),或 -i-Pr3-
2,4,6 (LTripH),通过
钯催化的交叉偶联反应制备。其中三种胺已经进行了晶体学表征。将GeCl2·
二氧六环与每种
脱质子化胺的1当量处理,得到了翻译的
氨基
锗(II)
氯化物配合物,[LGeCl] (L = L†, Lt-Bu, L , 或LTrip)。类似地,已知的
氨基
二锗烷,[L*Ge-GeL*] (L* = -N(Ar*)(SiMe3)),与I2反应导致了
二锗烷的
氧化裂解,形成了第一个二配位的
氨基
锗(II)
碘化物配合物,[L*GeI]。对[Lt-BuGeCl]和[L*GeI]的晶体学表征显示它们都具有类似的单体结构。本研究描述的化合物应该对在低
氧化态主族
化学领域工作的合成
化学家具有实用价值。