ene π‐bonded form (sp2‐C), as group 15 is descended. The uranium(IV)–cyclometallate complex [UN(CH2CH2NSiPri3)2(CH2CH2SiPri2CH(Me)CH2)}] reacts with 1As and 1P by α‐proton abstraction to give [U(TrenTIPS)(CHEPh3)] (TrenTIPS=N(CH2CH2NSiPri3)3; E=As, 2As; P, 2P), where 2As is an unprecedented structurally characterised arsonium‐carbene complex. The short U−C distances and obtuse U‐C‐E angles suggest
用[Na N(SiMe 3)2 }]处理[Ph 3
EMe] [I],得到叶立德[Ph 3 E = CH 2 ](E = As,1As; P,1P)。对于1A来说,这克服了以前合成经典
砷化钇的困难,这在历史上一直阻碍其广泛的研究。的结构1AS现已确定45年后它首先被令人信服地分离,并与1P,证实长提出增加叶立德-碳pyramidalisation,突出E的增加支配地位的假说+ -C -偶极共振表格(sp 3C)在E = C烯π键形式(sp 2 -C)上,第15组下降。
铀(IV)-环
金属盐络合物[U N(CH 2 CH 2 NSiPr i 3)2(CH 2 CH 2 SiPr i 2 CH(Me)CH 2)}]通过α-质子抽象与1As和1P反应生成给出[U(Tren
TIPS)(CHEPh 3)](Tren
TIPS = N(CH 2 CH 2 NSiPr i 3)3 ; E = As,2As