Electron-Precise Coordination Modes of Boron-Centered Ligands

Abstract

progress made in late-transition metal boryl complexes, a field which has seen a number of exciting developments in the past couple of years. Reviews covering other forms of metal-boron covalent and dative interactions have since appeared in a number of publications. [20][21][22][23][24][25][26][27][28][29][30][31][32] We have attempted to comprehensively cover the remaining sections regarding complexes with two-center M f B dative interactions ("borane"), B-R fragments as terminal or bridging ligands ('borylene'), and a lone boron atom as ligand ("boride").

Unsupported boron–carbon σ-coordination to platinum as an isolable snapshot of σ-bond activation

“…Figure 2 shows that analogous distances in metallacyclobutene derivatives in which BR is replaced with CR 2 , NR or O (145-169% of Σ covrad ) are all significantly longer than that of 2 (121% of Σ covrad )-this includes highly comparable platinacyclobutene structures [41][42][43] . The Pt-C distance in 2 is within the range found in classical σ-vinyl complexes, whereas the Pt-B distance is slightly longer than those found in Pt-boryl complexes, although a part of this lengthening could stem from the bulky mesityl group at boron 53 . Nevertheless, a description involving complete Pt-insertion into the borirene fragment is incompatible with the observation of such a short B-C distance.…”

Toward a comprehensive definition of oxidation state (IUPAC Technical Report)

“…60, center bottom), and ZrCl 4 [333]. The richness and the vibrancy of the field are eloquently illustrated in numerous recent reviews which focus not only on the structures of these unusual complexes but also on their intriguing reactivities [151,[334][335][336][337][338].…”

The Doubly Base‐Stabilized Diborane(4) [HB(μ‐hpp)]2 (hpp = 1,3,4,6,7,8‐hexahydro‐2H‐pyrimido[1,2‐a]pyrimidinate): Synthesis by Catalytic Dehydrogenation and Reactions with S8 and Disulfides

“…[5,6] A number of complexes with borane, boryl, borylene and also boride ligands were synthesized, showing exciting electronic properties and a great potential for several applications. [7] For example, boryl ligands were intensively applied in metal-catalysed borylation reactions. [8] Recently even a first oxoboryl complex has been synthesized.…”