Tetra­ethyl­ammonium dicyanidobis(ethane-1,2-dithiol­ato)tetra-μ3-sulfido-dimolybdenum(V)dicopper(I)

The title compound, (C8H20N)2[Cu2Mo2(C2H4S2)2(CN)2S4], is a sulfide-bridged tetranuclear complex in which the complex anion comprises one [(edt)2Mo2S2(μ-S)2]2− unit (edt = ethanedithiol­ate) and two CuCN units joined through six Cu—μ3-S bonds, thus forming a cubane-like [Mo2S4Cu2] core. There are two independent cation–anion complex entities in the asymmetric unit. Bond distances are normal for this type of complex [ranges: Mo—S = 2.193 (2)–2.390 (2); Cu—S = 2.266 (2)–2.470 (2); Cu—C = 1.899 (7)–1.911 (9) Å]. One of the thiol­ato C atoms is disordered over two sites in a 0.52 (3):0.48 (3) ratio

Analysis of GT-3a identifies a distinct subgroup of trihelix DNA-binding transcription factors in Arabidopsis

AbstractTrihelix DNA-binding factors (or GT factors) bind to GT elements found in the promoters of many plant genes. Although the binding specificity and the transcriptional activity of some members (e.g. GT-1 and GT-2) have been studied, the regulatory function of this family of transcription factors remains largely unknown. In this work, we have characterised a new GT factor, namely GT-3a, and a closely related member, GT-3b. We show that (1) they can form either homo- or heterodimers but do not interact with GT-1; (2) they are predominantly expressed in floral buds and roots; (3) GT-3a cannot bind to the binding sites of GT-1 or GT-2, but binds to the cab2 and rbcS-1A gene promoters via the 5′-GTTAC sequence, which has been previously shown to be the core of the Site 1 type of GT elements. These results suggest that GT-3a and GT-3b belong to a distinct subgroup of GT factors and that each subgroup of GT factors binds to a functionally distinct type of cis-acting GT elements

(meso-5,7,7,12,14,14-Hexamethyl-1,4,8,11-tetra­azacyclo­tetra­deca-4,11-diene)nickel(II) bis­[O,O′-bis(4-methyl­phen­yl) dithio­phosphate]

In the title compound, [Ni(C16H32N4)](C14H14O2PS2)2 or [Ni(trans[14]dien)][S2P(OC6H4Me-4)2]2, where trans[14]dien is meso-5,7,7,12,14,14-hexa­methyl-1,4,8,11-tetra­azacyclo­tetra­deca-4,11-diene, the NiII ion lies across a centre of inversion and is four-coordinated in a relatively undistorted square-planar arrangement by the four N atoms of the macrocyclic ligand trans[14]dien. The two O,O′-di(4-methyl­phen­yl)dithio­phos­phates act as counter-ions to balance the charge. Important geometric data include Ni—N = 1.9135 (16) and 1.9364 (15) Å

DiffNAS: Bootstrapping Diffusion Models by Prompting for Better Architectures

Diffusion models have recently exhibited remarkable performance on synthetic data. After a diffusion path is selected, a base model, such as UNet, operates as a denoising autoencoder, primarily predicting noises that need to be eliminated step by step. Consequently, it is crucial to employ a model that aligns with the expected budgets to facilitate superior synthetic performance. In this paper, we meticulously analyze the diffusion model and engineer a base model search approach, denoted "DiffNAS". Specifically, we leverage GPT-4 as a supernet to expedite the search, supplemented with a search memory to enhance the results. Moreover, we employ RFID as a proxy to promptly rank the experimental outcomes produced by GPT-4. We also adopt a rapid-convergence training strategy to boost search efficiency. Rigorous experimentation corroborates that our algorithm can augment the search efficiency by 2 times under GPT-based scenarios, while also attaining a performance of 2.82 with 0.37 improvement in FID on CIFAR10 relative to the benchmark IDDPM algorithm

catena-Poly[[(nitrato-κ2 O,O′)silver(I)]-μ-1,2-bis­(diphenyl­phosphino)ethane-κ2 P:P′]

In the title chain compound, [Ag(NO3)(C26H24P2)]n, the bis­(diphenyl­phosphino)ethane (dppe) units link the Ag+ ions into chains along [001]. A nitrate anion is coordinated to the Ag atom. There is a centre of symmetry at the mid-point of the ethane C—C bond and a twofold rotation axis passes through the Ag, N and terminal O atoms. Each Ag atom is four-coordinated in a distorted tetra­hedral geometry by two O atoms of the nitrate anion and two P atoms of dppe ligands. The two aromatic rings are oriented at a dihedral angle of 73.77 (3)°

N′-[(E)-(5-Bromo-2-hydroxy­phen­yl)(phen­yl)methyl­idene]-4-chloro­benzo­hydrazide

The Schiff base, C20H14BrClN2O2, displays a trans conformation with respect to the C=N double bond. The aromatic rings at either end of the –C(=O)–NH–N=C– fragment are nearly parallel [dihedral angle = 3.4 (5)°]. The hydr­oxy group forms an intra­molecular hydrogen bond to the imino N atom

N′-[(E)-(5-Bromo-2-hydroxy­phen­yl)(phen­yl)methyl­ene]benzohydrazide

In the title compound, C20H15BrN2O2, the C=N double bond displays a trans configuration. The crystal structure features an intra­molecular O—H⋯N hydrogen bond

N′-[(E)-1-(5-Bromo-2-hydroxy­phen­yl)ethyl­idene]benzohydrazide

The C=N double bond in the title compound, C15H13BrN2O2, is trans E configured and the dihedral angle between the aromatic ring planes is 22.3 (1)°. The crystal structure is stabilized by intra­molecular O—H⋯O and inter­molecular N—H⋯O hydrogen bonds

(5-Bromo-2-hydroxy­phen­yl)(phen­yl)methanone

In the title compound, C13H9BrO2, the dihedral angle between the aromatic ring planes is 53.6 (1)°. The crystal structure is stabilized by intra­molecular O—H⋯O and inter­molecular C—H⋯O hydrogen bonding and C—H⋯π inter­actions