The variation of tetrahedral bond lengths in sodic plagioclase feldspars

1973 ◽  
Vol 39 (4) ◽  
pp. 327-339 ◽  
Author(s):  
Michael W. Phillips ◽  
Paul H. Ribbe
Keyword(s):  
Bond Lengths ◽  
Sodic Plagioclase ◽  
Tetrahedral Bond

Lattice parameters of Zn1−xMnxSe and tetrahedral bond lengths in AII1−xMnxBVIalloys

1985 ◽  
Vol 58 (11) ◽  
pp. 4056-4060 ◽  
Author(s):  
D. R. Yoder‐Short ◽  
U. Debska ◽  
J. K. Furdyna
Keyword(s):  
Lattice Parameters ◽  
Bond Lengths ◽  
Tetrahedral Bond

Dihedral Angles of the Cycloheptane Ring

1988 ◽  
Vol 41 (7) ◽  
pp. 1139 ◽  
Author(s):  
GA Bottomley
Keyword(s):  
Membered Ring ◽  
Dihedral Angles ◽  
Bond Angles ◽  
Bond Lengths ◽  
Tetrahedral Bond

A method is described for calculating sets of dihedral angles in a seven- membered ring with equal tetrahedral bond angles and equal bond lengths. Representative values are given for the separate chair and boat manifolds of solutions.

Size dependence of tetrahedral bond lengths in CdSe nanocrystals

2007 ◽  
Vol 90 (16) ◽  
pp. 161911 ◽  
Author(s):  
Pin-Jiun Wu ◽  
Yuri P. Stetsko ◽  
Ku-Ding Tsuei ◽  
Roman Dronyak ◽  
Keng S. Liang
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Bond Lengths ◽  
Tetrahedral Bond

Vibrational spectra of aquadioxotetra; peroxodivanadates(V) M2[V2O2(O2)4(H2O)]·xH2O (M = N(CH3)4, Cs)

1990 ◽  
Vol 55 (6) ◽  
pp. 1485-1490 ◽  
Author(s):  
Peter Schwendt ◽  
Milan Sýkora
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Empirical Correlations ◽  
Normal Coordinate ◽  
Bond Lengths ◽  
Stretching Vibrations

The infrared and Raman spectra of M2[V2O2(O2)4(H2O)]·xH2O and M2[V2O2(O2)4(D2O)]·xD2O (M = N(CH3)4, Cs) were measured. In the region of the vanadium-oxygen stretching vibrations, the spectra were interpreted based on normal coordinate analysis, employing empirical correlations between the bond lengths and force constants.

The relation between carbon-hydrogen bond lengths and bond angles

1958 ◽  
Vol 54 ◽  
pp. 1261 ◽  
Author(s):  
C. W. N. Cumper
Keyword(s):  
Hydrogen Bond ◽  
Bond Angles ◽  
Bond Lengths

scholarly journals Crystal structure of K[Hg(SCN)3] – a redetermination

2014 ◽  
Vol 70 (9) ◽  
pp. i46-i46 ◽  
Author(s):  
Matthias Weil ◽  
Thomas Häusler
Keyword(s):  
Crystal Structure ◽  
Room Temperature ◽  
Three Dimensional ◽  
Lattice Parameters ◽  
Bond Lengths ◽  
Dimensional Network ◽  
Anisotropic Displacement Parameters ◽  
Precision And Accuracy ◽  
Standard Deviations ◽  
Atomic Coordinates

The crystal structure of the room-temperature modification of K[Hg(SCN)3], potassium trithiocyanatomercurate(II), was redetermined based on modern CCD data. In comparison with the previous report [Zhdanov & Sanadze (1952).Zh. Fiz. Khim.26, 469–478], reliability factors, standard deviations of lattice parameters and atomic coordinates, as well as anisotropic displacement parameters, were revealed for all atoms. The higher precision and accuracy of the model is, for example, reflected by the Hg—S bond lengths of 2.3954 (11), 2.4481 (8) and 2.7653 (6) Å in comparison with values of 2.24, 2.43 and 2.77 Å. All atoms in the crystal structure are located on mirror planes. The Hg2+cation is surrounded by four S atoms in a seesaw shape [S—Hg—S angles range from 94.65 (2) to 154.06 (3)°]. The HgS4polyhedra share a common S atom, building up chains extending parallel to [010]. All S atoms of the resulting1∞[HgS2/1S2/2] chains are also part of SCN−anions that link these chains with the K+cations into a three-dimensional network. The K—N bond lengths of the distorted KN7polyhedra lie between 2.926 (2) and 3.051 (3) Å.

scholarly journals Influence of Copper(I) Halides on the Reactivity of Aliphatic Carbodiimides

2020 ◽  
Vol 3 (1) ◽  
pp. 20
Author(s):  
Valentina Ferraro ◽  
Marco Bortoluzzi
Keyword(s):  
Density Functional Theory ◽  
Electronic Structure ◽  
General Formula ◽  
Electron Density ◽  
Density Functional ◽  
Functional Theory ◽  
Fukui Functions ◽  
Bond Lengths ◽  
Linear Complexes ◽  
Nitrogen Bond

The influence of copper(I) halides CuX (X = Cl, Br, I) on the electronic structure of N,N′-diisopropylcarbodiimide (DICDI) and N,N′-dicyclohexylcarbodiimide (DCC) was investigated by means of computational DFT (density functional theory) methods. The coordination of the considered carbodiimides occurs by one of the nitrogen atoms, with the formation of linear complexes having a general formula of [CuX(carbodiimide)]. Besides varying the carbon–nitrogen bond lengths, the thermodynamically favourable interaction with Cu(I) reduces the electron density on the carbodiimides and alters the energies of the (NCN)-centred, unoccupied orbitals. A small dependence of these effects on the choice of the halide was observable. The computed Fukui functions suggested negligible interaction of Cu(I) with incoming nucleophiles, and the reactivity of carbodiimides was altered by coordination mainly because of the increased electrophilicity of the {NCN} fragments.

Iron‐Iron Bond Lengths and Bond Orders in Diiron Lantern‐Type Complexes with High Spin Ground States

2021 ◽  
Author(s):  
Fitzerald Hujon ◽  
Richard H. Duncan Lyngdoh ◽  
R. Bruce King
Keyword(s):  
High Spin ◽  
Ground States ◽  
Bond Orders ◽  
Bond Lengths ◽  
Iron Iron

ChemInform Abstract: UNUSUAL BOND LENGTHS, CONFORMATIONS, AND LIGAND EXCHANGE RATES IN B12 MODELS WITH THE BIS(SALICYLIDENE)-O-PHENYLENEDIAMINE EQUATORIAL LIGAND

1984 ◽  
Vol 15 (46) ◽  
Author(s):  
M. F. SUMMERS ◽  
L. G. MARZILLI ◽  
N. BRESCIANI-PAHOR ◽  
L. RANDACCIO
Keyword(s):  
Exchange Rates ◽  
Ligand Exchange ◽  
Bond Lengths ◽  
Equatorial Ligand

Synthesis and Crystal Structures of Three Carboxylate- Bridged Tetranuclear Copper(II) - Lanthanide(III) Complexes of Ph3P+CH2CH2CO2−

1999 ◽  
Vol 52 (10) ◽  
pp. 983 ◽  
Author(s):  
Yang-Yi Yang ◽  
Seik Weng Ng ◽  
Xiao-Ming Chen
Keyword(s):  
Oxygen Atom ◽  
Crystal Structures ◽  
Triclinic Space Group ◽  
Coordination Environment ◽  
Space Group ◽  
Bond Angles ◽  
Bond Lengths ◽  
Metal Atoms ◽  
Apical Site

Three tetranuclear copper(II)–lanthanide(III) complexes of triphenylphosphoniopropionate (Ph3P+CH2CH2CO2−,tppp), namely [Cu2Ln2(tppp)8(H2O)8](ClO4)10·2H 2 O [Ln = EuIII, NdIII or CeIII], were synthesized and characterized by crystallography. The EuIII complex crystallizes in the triclinic space group P1 – with a 16.249(7), b 17.185(11), c 17.807(11) Å, α 69.750(10), β 89.230(10), γ 84.070(10)˚, V 4639(5) Å3, Z 1. In the crystal structures, four tppp ligands bridge a pair of CuII and tetraaquo-EuIII atoms (Cu···Eu 3.527(2) Å) through their µ2-carboxylato ends to form a dinuclear subunit; two of these subunits are additionally linked by one of the CuII -bonded carboxylato oxygen ends, across a centre of inversion, to furnish a dimeric tetranuclear [Cu(tppp)4 Eu(H2O)4]2 species (Cu···Cu 3.323(2) Å). This CuII -bonded oxygen atom occupies the apical site of the square-pyramidal coordination environment of the CuII atom. The EuIII atom is eight-coordinated in a square-antiprismatic geometry. The NdIII and CeIII complexes are isomorphous to the EuIII complex, and only minor differences in bond lengths and bond angles involving the metal atoms are noted.

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