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)-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

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

(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

{N′-[(E)-(5-Bromo-2-oxidophen­yl)(phen­yl)methyl­ene]benzohydrazidato}pyridine­nickel(II)

The asymmetric unit of title complex, [Ni(C20H13BrN2O2)(C5H5N)], contains two independent mol­ecules. In each mol­ecule, the central NiII atom has a square-planar environment, formed by the tridentate hydrazone and the monodentate pyridine ligands, with the N atoms in a trans arrangement about the NiII atom

{N′-[(E)-(5-Bromo-2-oxidophen­yl)(phen­yl)methyl­ene]benzohydrazidato}pyridine­copper(II)

The asymmetric unit of title complex, [Cu(C20H13BrN2O2)(C5H5N)], contains two independent mol­ecules. In each mol­ecule, the central CuII atom has a square-planar environment formed by the tridentate hydrazone and the monodentate pyridine ligands, with the N atoms in a trans arrangement about the CuII atom

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

{N′-[(E)-1-(5-Bromo-2-oxidophen­yl)ethyl­idene]-4-chloro­benzohydrazidato}pyridinenickel(II)

The title complex, [Ni(C15H10BrClN2O2)(C5H5N)], displays a square-planar coordination geometry around the NiII ion, formed by the tridentate hydrazone and monodentate pyridine ligands, with the N atoms in a trans arrangement about the Ni center