Monoclinic modification of aquadi-n-butyl­bis­(pyrazine-2-carboxyl­ato-κ2 N 1,O)tin(IV)

The asymmetric unit of the title organotin(IV) compound, [Sn(C4H9)2(C5H3N2O2)2(H2O)], contains one-and-a-half mol­ecules. The half-mol­ecule is completed by crystallographic twofold symmetry, with its Sn and water O atoms lying on the rotation axis. Both mol­ecules feature seven-coordinate Sn atoms in trans-C2SnN2O3 penta­gonal-bipyramidal coordination environments. The carboxyl­ate anions N,O-chelate to the Sn atom. In the crystal, the carboxyl­ate O atoms not involved in coordination serve as acceptors for O—H⋯O hydrogen bonds from adjacent water mol­ecules, generating a three-dimensional network

(5E)-Dimethyl 2-bromo­methyl-5-cyclo­hexyl­imino-2-phenyl-2,5-dihydro­furan-3,4-dicarboxyl­ate

The mol­ecule of the title compound, C21H24BrNO5, has a planar furan ring [maximum deviation = 0.025 (3) Å]. The carboxy­methyl group in the 3-position is nearly coplanar with this ring [dihedral angle = 7.9 (1)°], whereas that in the 4-position is nearly perpendicular to it [dihedral angle = 78.9 (1) Å]

catena-Poly[[silver(I)-μ-[N-(4-pyridyl­meth­yl)pyridine-4-carboxamide-κ2 N:N′]] nitrate monohydrate]

The title coordination polymer, {[Ag(C12H11N3O)]NO3·H2O}n, has a polycationic chain motif in which the Ag atom is bridged by the heterocyclic ligand; the Ag atom shows linear coordination. If the two long Ag⋯Onitrate inter­actions [2.794 (6) and 2.867 (5) Å] are regarded as bonds, the compound adopts a three-dimensional network structure. The water mol­ecule consolidates the network structure by forming hydrogen bonds, one to the polycationic chain and one to the nitrate anion

2-(Tritylsulfan­yl)ethyl 2-iodo­benzoate

The methine C atom of the triphenyl­methyl group in the title compound, C28H23IO2S, is slightly flattened out [ΣCphen­yl—C—Cphen­yl = 335.6 (5)°]. The –C—O—C—C—S– chain connecting the triphenyl­methyl group and the aromatic ring adopts an extended zigzag conformation, these five atoms lying on an approximate plane (r.m.s. deviation = 0.120 Å)

Bis(2-hydroxy­imino­methyl-6-methoxy­phenolato-κ2 O 1,N)nickel(II)

The Ni atom in the title compound, [Ni(C8H8NO3)2], lies on a center of inversion in a square-planar coordination enviroment. The hydroxyl group of one anion forms a short hydrogen bond to the metal-coordinated O atom of the other anion

The Four-Fermi Model in Three Dimensions at Non-Zero Density and Temperature

The Four Fermi model with discrete chiral symmetry is studied in three dimensions at non-zero chemical potential and temperature using the Hybrid Monte Carlo algorithm. The number of fermion flavors is chosen large $(N_f=12)$ to compare with analytic results. A first order chiral symmetry restoring transition is found at zero temperature with a critical chemical potential $\mu_c$ in good agreement with the large $N_f$ calculations. The critical index $\nu$ of the correlation length is measured in good agreement with analytic calculations. The two dimensional phase diagram (chemical potential vs. temperature) is mapped out quantitatively. Finite size effects on relatively small lattices and non-zero fermion mass effects are seen to smooth out the chiral transition dramatically.Comment: 21 pages, sorry, no figure

catena-Poly[[dimethyl­bis­(thio­cyanato-κN)tin(IV)]-μ-(4,4′-bipyridine-κ2 N:N′)]

The title dimethyl­tin diisothio­cyanate adduct of 4,4′-bipyridine, [Sn(CH3)2(NCS)2(C10H8N2)]n, adopts a chain motif in which the N-heterocycle functions as a bridge to adjacent all-trans octa­hedrally coordinated tin atoms. The SnIV atom lies on a special position of 2/m site symmetry, the methyl C atom on a special position of 2 site symmetry, and the thio­cyanate and 4,4′-bipyridine on a special position of m site symmetry

Bis[2-(2-pyridyl­sulfan­yl)eth­yl]ammonium perchlorate

The cation and anion of the title salt, C14H18N3S2 +·ClO4 −, lie on a twofold rotation axis. The cation is a W-shaped entity with the aromatic rings at the ends; the ammonium NH2 + group is a hydrogen-bond donor to the pyridyl N atoms. The perchlorate ion has one O atom disordered over two sites in a 0.50:0.50 ratio

The electricity demand of an EV providing power via vehicle-to-home and its potential impact on the grid with different electricity price tariffs

Electricity demand is expected to grow in the upcoming years due to the electrification of transport, which will likely result in an increase in electricity peak demand when charging at home; this would not represent a problem for the electric vehicle (EV) owner but could potentially destabilise the grid. This work has compared the use of stationery and vehicle-to-home (V2H) energy storage systems to minimise the electricity bill for the household consumers. The impact of using different electricity tariffs and the peak demand derived by this was also investigated. Real-world data was used to model the availability of the EVs to provide V2H during the day. Constraints to guarantee adequate charging of the EV to ensure the ability to provide transportation have been implemented. Two different stationary batteries and two EVs were used for the simulations. High peaks on the demand of up to 6 kW per vehicle (the bi-directional charger’s maximum capacity) and up to 5 kW (the batteries charger’s maximum capacity) are expected every time that the electricity price drops, and low peaks are expected when the electricity price increases. Moreover, high peaks are expected mostly at night when the electricity price tends to be cheaper and/or after driving the EV and plug it again to charge, however the model will try to constraint the charging of the EV until the price is low again unless there is a journey likely to happen in the near future. The combination of PV generation with a stationary battery or a V2H technology can produce savings of at least 30% regardless the electricity tariff and a reduction of up to 85% in the electricity bill can be achieved under the Time-of-day tariff. The results give a perspective of what can the grid expect when charging an EV at home during winter