Synthesis and structure of [{(ButO)2Sb3(μ-NCy)3(μ3-NCy)}K·η6-C6H5Me]; a sandwich complex containing a unique SbIII nido cage anion (Cy = cyclohexyl, C6H11)

Pd/Light‐Accelerated Atom‐Transfer Carbonylation of Alkyl Iodides: Applications in Multicomponent Coupling Processes Leading to Functionalized Carboxylic Acid Derivatives

“…The phenyl rings are oriented 95.5° with respect to each other and the NK bond lengths range from 2.7656(18) (N2K1) to 2.8923(17) Å (N1K1′), which is in the expected range 15. The distance of the potassium cation from the coordinating phenyl ring32 is on average 3.3 Å, which is comparable to [{( t BuO) 2 Sb 3 (μ‐NCy) 3 (μ 3 ‐NCy)}{K(η 6 ‐C 6 H 5 Me)}],33 [Ph 3 CK(thf)(pmdta)], [PyPh 2 CK(thf)(pmdta)] (pmdta=pentamethyldiethylenetriamine)34 or [{(HN t Bu)(N t Bu)Zr(η 2 ‐(PN t Bu) 2 (N t Bu) 2 )}{K(η 6 ‐C 7 H 8 )}] 35…”

Reactions of the spiro monoanion [{(Me2N)Sb(μ-NCy)2}2Sb]− with alcohols and thiols (REH; E = O or S); syntheses of nido-[Sb3(μ-NCy)3(μ3-NCy)(ER)2] anions and the unique antimony(III) imido cubane [(2-NC5H4O)Sb(μ3-NCy)]4 (Cy= cyclohexyl)

“…Details of the low-temperature structure of complex 2 (having a nido structure related to that of 3) have been communicated previously and no further discussion will be provided here, except by way of comparison. 5 The low-temperature structure of Na[{(Me 2 N)Sb(µ-NCy) 2 } 2 -Sb] 1ؒNa (Fig. 1) shows that the complex is an ion-paired species, composed of a [{(Me 2 N)Sb(µ-NCy) 2 } 2 Sb] Ϫ monoanion which co-ordinates a Na ϩ cation.…”

“…In a recent communication we showed that the reaction of the antimony-() anion [{(Me 2 N)Sb(µ-NCy) 2 } 2 Sb] Ϫ 1 (Cy = cyclohexyl) with t BuOH (2 equivalents) results in rearrangement of the spiro structure into a nido framework, [Sb 3 (µ-NCy) 3 (µ 3 -NCy)-(O t Bu) 2 ] Ϫ (Scheme 1). 5 This observation is in contrast to the reaction with CyNH 2 which results in simple replacement of the Me 2 N groups and in retention of the spiro core of the ligand, in the product [{(CyNH)Sb(µ-NCy) 2 } 2 Sb] Ϫ . 2a The difference between the outcomes of the reactions involving t BuOH and CyNH 2 was attributed to the greater electronegativity of O.…”

Novel Multidentate Sulfur–Nitrogen Ligands with Enhanced Complexation Properties

“…[15] The distance of the potassium cation from the coordinating phenyl ring [32] is on average 3.3 , which is comparable to [{(tBuO) 2 [33] …”