1,3-Bis(2,6-diisopropylphenyl)-2,2,4,4-tetramethyl-1,3-diaza-2,4-disilacyclobutane

Mixed‐Donor Amido–Siloxo Actinide(IV) Halide and Alkyl Complexes with an Aryl Cipso Interaction

“…Additional attempts to grow crystals of the putative uranium‐containing product were continually thwarted by recurrences of {NSi(Me 2 )} 2 . The synthesis and characterisation of {NSiMe 2 } 2 and other less‐hindered cyclodisilazanes has been previously reported, and the crystal structure of {NSi(Me 2 )} 2 has been reported (and matches our independently determined structure) 63–65. Notably, the first reported synthesis of the related diamido–ether ligand, [ t Bu NON] 2– , describes the isolation of the corresponding cyclodisilazane [ t Bu NSi(Me 2 )] 2 in low yield concurrent with ligand synthesis,66,67 which indicates that the silyl ether framework is susceptible to decomposition in this way.…”

The crystal structure of 2-chloro-1,3-bis(2,4,6-trimethylphenyl)-4,4-dimethyl-1,3,2λ3,4-diazaphosphasiletidine

“…The unusually acute N1-Si1-N2 angle in the title compound is associated with Si-N distances of 1.7436(17) Å (Si1-N1) and 1.7445(17) Å (Si1-N2). The latter are remarkably longer than the value reported for a Si-N single bond (1.724(4) Å [13]), but correspond to those in related cyclodisilazanes [14][15][16][17][18][19][20][21][22]. Consequently, the P-N bonds are shorter than expected for a single bond (1.6857(17) Å (P1-N1) and 1.6854(17) Å (P1-N2) vs. 1.704(4) Å [13]).…”

Dianionic amidinates at silicon and germanium centers: Four-, six- and eight-membered rings

“…From the structure it is obvious that the two imide units are in anti conformation, indicating that not the syn compound s4b, but the anti a4b has been formed. There are no remarkable deviations from the respective data of known compounds of this type [9][10][11][12][13][14][15][16][17][18], whereby a common feature are the small N-Si-N and the larger Si-N-Si angles, although in a4b, these values lie at the low (83.9(1)°) and the high end (96.2(1)°) with a non-bonding Si. .…”