cyclo-Tetra­kis(μ-3-acetyl-4-methyl-1H-pyrazole-5-carboxyl­ato-κ4 N 2,O 3:N 1,O 5)tetra­kis[aqua­copper(II)] tetra­deca­hydrate

The title compound, [Cu4(C7H6N2O3)4(H2O)4]·14H2O, a tetra­nuclear [2 × 2] grid-type complex with S4 symmetry, contains four CuII atoms which are bridged by four pyrazole­carboxyl­ate ligand anions and are additionally bonded to a water molecule. Each CuII atom is coordinated by two O atoms of the carboxyl­ate and acetyl groups, two pyrazole N atoms of doubly deprotonated 3-acetyl-4-methyl-1H-pyrazole-5-carb­oxy­lic acid and one O atom of a water mol­ecule. The geometry at each CuII atom is distorted square-pyramidal, with the two N and two O atoms in the equatorial plane and O atoms in the axial positions. O—H⋯O hydrogen-bonding interactions additionally stabilize the structure. One of the uncoordinated water molecules shows half-occupancy

Poly[di-μ2-aqua-μ5-(pyridine-2,6-dicarboxyl­ato)-μ3-(pyridine-2,6-dicarboxyl­ato)-cobalt(II)disodium]

In the title compound, [CoNa2(C7H3NO4)2(H2O)2]n, the CoII atom is coordinated by two pyridine N atoms and four carboxyl­ate O atoms from two doubly deprotonated pyridine-2,6-dicarboxyl­ate ligands in a distorted octa­hedral geometry. One Na+ cation is coordinated by three carboxyl­ate O atoms and two water mol­ecules and the other is coordinated by five carboxyl­ate O atoms and two water mol­ecules in an irregular geometry. The bis­(pyridine-2,6-dicarboxyl­ato)cobalt complex units are connected by Na+ cations and bridging water mol­ecules into a three-dimensional coordination network. O—H⋯O hydrogen bonds are formed between the water mol­ecules and the carboxyl­ate O atoms

Poly[bis­[μ4-N-(2-hydroxy­imino­propion­yl)-N′-(2-oxidoimino­propion­yl)propane-1,3-diaminato]dimethano­lcalciumdicopper(II)]

In the title compound, [CaCu2(C9H13N4O4)2(CH3OH)2]n, the CaII atom lies on an inversion center and is situated in a moderately distorted octa­hedral environment. The CuII atom is in a distorted square-pyramidal geometry, defined by four N atoms belonging to the amide and oxime groups of the triply deprotonated residue of N,N′-bis­(2-hydroxy­imino­propano­yl)propane-1,3-diamine (H4pap) and one oxime O atom from a neighboring Hpap ligand at the apical site, forming a dimeric [Cu2(Hpap)2]2− unit. Each dimeric unit connects four Ca atoms and each Ca atom links four [Cu2(Hpap)2]2− units through Ca—O(amide) bonds, leading to a three-dimensional framework. The crystal structure involves intra- and inter­molecular O—H⋯O hydrogen bonds

N-(2-Hydroxy­ethyl)-2-[2-(hydroxy­imino)propanamido]ethanaminium 2-(hydroxy­imino)propanoate

The cation of the title salt, C7H16N3O3 +·C3H4NO3 −, the oxime group is trans with respect to the amide–carbonyl group. The components of the structure are united into a three-dimensional network by an extensive system of O—H⋯O and N—H⋯O hydrogen bonds

(2RS)-3-Hydr­oxy-2-methyl-2-(2-pyrid­yl)imidazolidine-4-one

The title structure, C9H11N3O2, is a racemate. The chiral centre is situated at the N—C—N C atom of the imidazolidine ring. The inter­planar angle between the mean planes of the pyridine and imidazolidine rings is 89.41 (5)°. The methyl group is in a trans position with respect to the pyridine N atom. In the crystal, the mol­ecules are arranged in zigzag layers parallel to the b axis. The mol­ecules within the layers are inter­connected by strong O—H⋯N and weak N—H⋯O hydrogen bonds; the former take place between OH groups and amine N atoms and the latter between the amine N atom and the carbonyl O atom. In addition, C—H⋯O inter­actions are also present

μ-Oxalato-bis­[(2,2′-bipyridyl)­copper(II)] bis(perchlorate) dimethyl­formamide disolvate monohydrate

The title compound, [Cu2(C2O4)(C10H8N2)4](ClO4)2·2C3H7NO·H2O, contains doubly charged centrosymmetric dinuclear oxalato-bridged copper(II) complex cations, perchlorate anions, and DMF and water solvate mol­ecules. In the complex cation, the oxalate ligand is coordinated in a bis-bidentate bridging mode to the Cu atoms. Each Cu atom has a distorted tetra­gonal-bipyramidal environment, being coordinated by two N atoms of the two chelating bipy ligands and two O atoms of the doubly deprotonated oxalate anion. Pairs of perchlorate anions and water mol­ecules are linked into recta­ngles by O—H⋯O bonds in which the perchlorate O atoms act as acceptors and the water mol­ecules as donors. Methyl groups of the DMF solvent molecule are disordered over two sites with occupancies of 0.453 (7):0.547 (7), and the water molecule is half-occupied

Crystal structure and Hirshfeld surface analysis of (E)-2-(2,4,6-trimethylbenzylidene)-3,4-dihydronaphthalen-1(2H)-one

A novel chalcone, C20H20O, derived from benzylidenetetralone, was synthesized via Claissen-Schmidt condensation between tetralone and 2,4,6-trimethyl-benzaldehyde. In the crystal, molecules are linked by C-H center dot center dot center dot O hydrogen bonds, producing R-2(2)(20) and R-2(4)(12) ring motifs. In addition, weak C-H center dot center dot center dot pi and pi-stacking interactions are observed. The intermolecular interactions were investigated using Hirshfeld surface analysis and two-dimensional fingerprint plots, revealing that the most important contributions for the crystal packing are from H center dot center dot center dot H (66.0%), H center dot center dot center dot C/C center dot center dot center dot H (22.3%), H center dot center dot center dot O/O center dot center dot center dot H (9.3%), and C center dot center dot center dot C (2.4%) interactions. Shape-index plots show pi-pi stacking interactions and the curvedness plots show flat surface patches characteristic of planar stacking

Diaqua­bis­(pyridine-2-carboxyl­ato-κ2 N,O)manganese(II) dimethyl­formamide hemisolvate

There are two crystallographically independent complex mol­ecules with very similar geometries in the unit cell of the title compound, [Mn(C6H4NO2)2(H2O)2]·0.5C3H7NO. The central ion is situated in a distorted octa­hedral environment of two N- and four O-donor atoms from two pyridine-2-carboxyl­ate ligands and two cis-disposed water mol­ecules. The carboxyl­ate ligands are coordinated in a chelate fashion with the formation of two five-membered rings. In the crystal, the complex mol­ecules are connected by O—H⋯O hydrogen bonds between the coordinated water mol­ecules and the uncoordinated carboxyl­ate O atoms, thus forming hydrogen-bonded walls disposed perpendicularly to the bc plane

Crystal structure and Hirshfeld surface analysis of 4-[4-(1H-benzo[d]imidazol-2-yl)phenoxy]phthalonitrile dimethyl sulfoxide monosolvate

This work presents the synthesis and structural characterization of [4-(1H-benzo[d]imidazol-2-yl) phenoxy]phthalonitrile, a phthalonitrile derivative carrying a benzimidazole moiety. The compound crystallizes as its dimethyl sulfoxide monosolvate, C21H12N4O center dot(CH3)(2)SO. The dihedral angle between the two fused rings in the heterocyclic ring system is 2.11 (1)degrees, while the phenyl ring attached to the imidazole moiety is inclined by 20.7 (1)degrees to the latter. In the crystal structure, adjacent molecules are connected by pairs of weak intermolecular C-H center dot center dot center dot N hydrogen bonds into inversion dimers. N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds with R-2(1)(7) graph-set motifs are also formed between the organic molecule and the disordered dimethyl sulfoxide solvent [occupancy ratio of 0.623 (5):0.377 (5) for the two sites of the sulfur atom]. Hirshfeld surface analysis and fingerprint plots were used to investigate the intermolecular interactions in the crystalline state

Efficiency of using our own bus fleet in multimodal door-to-door service

In the passenger transportation segment, there is a trend towards door-to-door travel planning. This direction, which is relevant in the world practice of passenger transportation, with a correctly proposed approach, can also be used in the cities of the Russian Federation.The use of a multimodal method of passenger transportation together with MaaS technologies in case of maximum involvement of carrier operators will allow passengers to significantly reduce travel time and find a way to reduce travel costs.Sophisticated logistics of commuter rail transport routes for all time periods will attract additional passenger traffic, increasing the profitability of passenger traffic.The conducted research on the example of the transport-interchange complex of the city of N showed the possibility of organizing a passenger's trip "from door to door" with minimal costs and maximum comfort. The passenger railway company receives direct profit from this service, which makes it possible to recoup the project in a short time. Conclusions are made about the dependence of the profitability of the bus fleet on the number of seats, distance and popularity of the route direction. The organization of additional services on the territory as close as possible to the places of embarkation and disembarkation of passengers will increase the attractiveness of the transport and interchange complex for the passenger traffic of N.</jats:p