(2,5-Diphenyl­pent-4-yn-1-en-3-yl­idene)triphenyl­phospho­rane

The title compound, C45H27P, was obtained as a product of the reaction of triphenyl­methyl­enephospho­rane with one molar equivalent of 1,4-diphenyl­butadiyne in toluene. The compound was very stable under ambient conditions, but rapidly decomposed in solution when exposed to the air. The P atom is tetra­coordinated in an approximately tetrahedral geometry. The length of the C C triple bond [1.206 (2) Å] is in the normal range

trans-Bis(4-methoxy­thio­phenolato-κS)bis­(trimethyl­phosphine-κP)nickel(II)

The title compound, [Ni(C7H7OS)2(C3H9P)2], was obtained as a product of the reaction of [NiMe2(PMe3)3] with two molar equivalents of 4-methoxy­thio­phenol in diethyl ether. The compound is stable in the air for several hours, but rapidly decomposes at room temperature in solution. The Ni atom displays a square-planar coordination with two P-donor atoms lying in trans positions. The benzene rings of the thio­phenolate ligands are almost perpendicular to the square coordination plane, making dihedral angles of 80.43 (4) and 72.60 (4)°

Benzyl­chloridobis(quinolin-8-olato)tin(IV)

In the title compound, [Sn(C7H7)(C9H6NO)2Cl], the SnIV ion is in a distorted octa­hedral coordination environment formed by the O and N atoms of two bis-chelating quinolin-8-olate ligands, a Cl atom and a C atom from a benzyl ligand. The axial sites are occupied by an N atom of a quinolinate ligand and the C atom of the benzyl ligand. The axial Sn—N bond is slightly shorter than the equatorial Sn—N bond

Cyanidophenyl­tris(trimethyl­phosphine)cobalt(II)

The title mol­ecule, [Co(C6H5)(CN)(C3H9P)3], lies on a crystallographic mirror plane with the CoII ion coordinated in a distorted square-pyramidal environment with one of the P atoms in the apical position. In the basal plane, the phenyl substituent is trans to the cyanide group with a C—Co—C angle which is significantly distorted from linearity

Dichloridotris(trimethyl­phosphine)nickel(II)

The title compound, [NiCl2(C3H9P)3], was obtained as a product of the reaction of [NiCl2(PMe3)2] with an equivalent trimethyl­phosphine in diethyl ether. It easily loses trimethyl­phosphine at room temperature to give NiCl2(PMe3)2. There are two independent mol­ecules in the asymmetric unit, and their bond lengths and angles are similar. The Ni environment is trigonal bipyramidal. One Ni, one P and two Cl atoms lie in the equatorial plane, with the remaining two P atoms occupying axial positions. The equatorial Ni—P bond length is shorter than the axial bond lengths

Di-μ-chlorido-bis­({9-[(2,6-diisopropyl­phen­yl)imino­meth­yl]anthracen-1-yl}palladium(II))

The centrosymmetric title compound, [Pd2Cl2(C27H26N)2], was obtained by a C—H bond-activation reaction of a Schiff base ligand with Li2PdCl4 in methanol, and was crystallized from dichloro­methane as orange crystals. The Pd atom displays a slightly distorted square-planar geometry, with the N- and C-atom donors in a cis arrangement

Digital Twin Brain: a simulation and assimilation platform for whole human brain

In this work, we present a computing platform named digital twin brain (DTB) that can simulate spiking neuronal networks of the whole human brain scale and more importantly, a personalized biological brain structure. In comparison to most brain simulations with a homogeneous global structure, we highlight that the sparseness, couplingness and heterogeneity in the sMRI, DTI and PET data of the brain has an essential impact on the efficiency of brain simulation, which is proved from the scaling experiments that the DTB of human brain simulation is communication-intensive and memory-access intensive computing systems rather than computation-intensive. We utilize a number of optimization techniques to balance and integrate the computation loads and communication traffics from the heterogeneous biological structure to the general GPU-based HPC and achieve leading simulation performance for the whole human brain-scaled spiking neuronal networks. On the other hand, the biological structure, equipped with a mesoscopic data assimilation, enables the DTB to investigate brain cognitive function by a reverse-engineering method, which is demonstrated by a digital experiment of visual evaluation on the DTB. Furthermore, we believe that the developing DTB will be a promising powerful platform for a large of research orients including brain-inspiredintelligence, rain disease medicine and brain-machine interface.Comment: 12 pages, 11 figure

Cobalt-Mediated Radical Copolymerization of Chlorotrifluoroethylene and Vinyl Acetate

Controlled radical copolymerization of chlorotrifluoroethylene (CTFE) and vinyl acetate (VAc) was successfully achieved in the presence of bis(acetylacetonato)cobalt(II) (Co(acac)2) as a mediated agent and 2,2′-azo-bis-isobutyronitrile (AIBN) as initiator. Both the molar mass and the fluorinated unit content of the copolymer could be controlled, and the chain extension polymerization of the obtained fluorinated copolymer was also achieved