01806nas a2200169   4500008004100000245013500041210007100176260000800247300001600255490000600271520113200277100001901409700002601428700002401454700001901478856013901497       2016                        eng d00aBenz–amidinato stabilized a monomeric calcium Iodide and a lithium calciate(II) cluster featuring group 1 and group 2 elements0 aBenz–amidinato stabilized a monomeric calcium Iodide and a lithi  cAPR  a1066–10710 v13 a<p>Soluble calcium halides reported so far are mostly dimeric in nature. The halides occupy the bridging position and thus provide additional coordination to the metal. We obtained a monomeric calcium iodide [{PhC(NiPr)(2)} CaI(thf)(3)] (1) from the reaction of [PhC(NiPr)(2)] Li with Cal(2) in THF. The compound has been stabilized by electronic donation and steric shielding from the amidinate ligand as well as coordination of three THF molecules. 1 does not show any propensity towards ligand exchange reaction. When the same reaction is carried out in diethyl ether instead of THF, it led to the formation of a Li calciate(II) cluster of composition L2Ca4I8Li4O (L= PhC(NiPr)(2)) (2) with an encapsulated O2+ in the middle of a tetrahedron spanned by four Ca2+ ions. 2 represents a metal-rich halide comprising of both alkali and alkaline earth metals which is quite unprecedented. Another notable aspect is that the amidinate ligand binds to the calcium atom in chelating bidentate mode in 1, whereas in 2 each N atom of the amidinate ligands binds to two Ca atoms leading to bridging bis-chelating coordination mode.</p>1 aYadav, Sandeep1 aSwamy, V., S. V. S. N1 aGonnade, Rajesh, G.1 aSen, Sakya, S.  uhttps://library.ncl.res.in/content/benz%E2%80%93amidinato-stabilized-monomeric-calcium-iodide-and-lithium-calciateii-cluster-featuring01733nas a2200241   4500008004100000022001400041245012100055210006900176260000800245300001400253490000700267520090400274653001701178653001401195653002001209653003601229653002601265100001901291700001701310700001701327700001901344856012801363       2018                        eng d  a0947-653900aBeyond hydrofunctionalisation: a well-defined calcium compound catalysed mild and efficient carbonyl cyanosilylation0 aBeyond hydrofunctionalisation a welldefined calcium compound cat  cJAN  a1269-12730 v243 a<p>Organocalcium compounds have been reported as efficient catalysts for various transformations, for cases in which one of the substrates contained an E-H (E=B, N, Si, P) bond. Here, we look at the possibility of employing an organocalcium compound for a transformation in which none of the precursors has a polar E-H bond. This study demonstrates the utilization of a well-defined amidinatocalcium iodide, [PhC(NiPr)(2)CaI] (1) for cyanosilylation of a variety of aldehydes and ketones with Me3SiCN under ambient conditions without the need of any co-catalyst. The reaction mechanism involves a weak adduct formation between 1 and Me3SiCN leading to the activation of the Si-C bond, which subsequently undergoes sigma-bond metathesis with a C=O moiety. Such a mechanistic pathway is unprecedented in alkaline earth metal chemistry. Experimental and computational studies support the mechanism.</p>10aCa catalysis10acarbonyls10acyanosilylation10aDensity functional calculations10atransition-metal free1 aYadav, Sandeep1 aDixit, Ruchi1 aVanka, Kumar1 aSen, Sakya, S.  uhttps://library.ncl.res.in/content/beyond-hydrofunctionalisation-well-defined-calcium-compound-catalysed-mild-and-efficient