Literature DB >> 23468675

trans-Bis(1,3-diphenyl-propane-1,3-dionato)(methanol)oxidovanadium(IV) methanol disolvate.

Carla Pretorius1, Johan A Venter, Andreas Roodt.   

Abstract

In the title compound, [V(C15H11O2)2O(CH3OH)]·2CH3OH, the V(IV) atom is coordinated by two 1,3-diphenyl-propane-1,3-dionate ligands and an oxide ligand in an axial position. The sixth position is occupied by the O atom of a methanol group bonded trans to the oxide atom. The octa-hedral geometry is significantly distorted, with the V(IV) atom lying 0.330 (3) Å above the equatorial plane formed by the O atoms of the two β-diketonate ligands. In the crystal, O-H⋯O hydrogen bonds between the coordinating methanol group in the complex and the two methanol solvent mol-ecules lead to the formation of polymeric chains along the c-axis direction. Weak C-H⋯O contacts are also observed.

Entities:  

Year:  2012        PMID: 23468675      PMCID: PMC3588710          DOI: 10.1107/S1600536812044686

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For synthetic background, see: Schilde et al. (1995 ▶). For other methanol-substituted vanadium complexes, see: Gao et al. (1998 ▶); Chen et al. (2004 ▶); Tasiopoulos et al. (1999 ▶). For meth­oxy-substituted vanadium complexes, see: Bansse et al. (1992 ▶).

Experimental

Crystal data

[V(C15H11O2)2O(CH4O)]·2CH4O M = 609.54 Monoclinic, a = 16.1411 (1) Å b = 10.7450 (6) Å c = 18.5378 (13) Å β = 113.579 (2)° V = 2946.7 (3) Å3 Z = 4 Mo Kα radiation μ = 0.39 mm−1 T = 100 K 0.47 × 0.07 × 0.05 mm

Data collection

Bruker APEXII KappaCCD diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2008 ▶) T min = 0.968, T max = 0.981 38614 measured reflections 7317 independent reflections 5545 reflections with I > 2σ(I) R int = 0.046

Refinement

R[F 2 > 2σ(F 2)] = 0.041 wR(F 2) = 0.102 S = 1.03 7317 reflections 412 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.45 e Å−3 Δρmin = −0.43 e Å−3 Data collection: APEX2 (Bruker, 2011 ▶); cell refinement: SAINT-Plus (Bruker, 2008 ▶); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: Mercury (Macrae et al., 2008 ▶); software used to prepare material for publication: WinGX (Farrugia, 1999 ▶), publCIF (Westrip, 2010 ▶), PARST (Nardelli, 1995 ▶) and PLATON (Spek, 2009 ▶). Click here for additional data file. Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536812044686/sj5267sup1.cif Click here for additional data file. Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812044686/sj5267Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
[V(C15H11O2)2O(CH4O)]·2CH4OF(000) = 1276
Mr = 609.54Dx = 1.374 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 7652 reflections
a = 16.1411 (1) Åθ = 2.2–27.7°
b = 10.7450 (6) ŵ = 0.39 mm1
c = 18.5378 (13) ÅT = 100 K
β = 113.579 (2)°Needle, red
V = 2946.7 (3) Å30.47 × 0.07 × 0.05 mm
Z = 4
Bruker APEXII KappaCCD diffractometer7317 independent reflections
Radiation source: fine-focus sealed tube5545 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.046
Detector resolution: 512 pixels mm-1θmax = 28.3°, θmin = 2.2°
φ and ω scansh = −21→21
Absorption correction: multi-scan (SADABS; Bruker, 2008)k = −14→8
Tmin = 0.968, Tmax = 0.981l = −24→24
38614 measured reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.041Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.102H atoms treated by a mixture of independent and constrained refinement
S = 1.03w = 1/[σ2(Fo2) + (0.0383P)2 + 2.0104P] where P = (Fo2 + 2Fc2)/3
7317 reflections(Δ/σ)max = 0.001
412 parametersΔρmax = 0.45 e Å3
0 restraintsΔρmin = −0.43 e Å3
0 constraints
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes.
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > 2σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
xyzUiso*/Ueq
C10.36765 (12)0.39961 (16)0.05770 (10)0.0162 (4)
C20.43706 (12)0.32029 (17)0.10546 (11)0.0173 (4)
C30.42559 (12)0.20489 (16)0.13327 (10)0.0169 (4)
C40.39167 (12)0.52183 (16)0.03351 (11)0.0167 (4)
C50.33514 (12)0.57289 (17)−0.03831 (11)0.0200 (4)
H50.28260.529−0.07150.024*
C60.35509 (13)0.68762 (17)−0.06167 (12)0.0226 (4)
H60.31660.7219−0.1110.027*
C70.43106 (13)0.75208 (17)−0.01303 (12)0.0234 (4)
H70.44410.8312−0.02880.028*
C80.48820 (13)0.70229 (17)0.05840 (12)0.0246 (4)
H80.54050.74690.09130.03*
C90.46897 (13)0.58668 (17)0.08203 (11)0.0218 (4)
H90.50820.5520.13090.026*
C100.50605 (12)0.12914 (17)0.18099 (10)0.0177 (4)
C110.58991 (13)0.18430 (19)0.22357 (11)0.0226 (4)
H110.59580.27230.22410.027*
C120.66476 (13)0.1110 (2)0.26513 (12)0.0274 (5)
H120.72160.14920.29370.033*
C130.65718 (14)−0.0174 (2)0.26531 (12)0.0278 (5)
H130.7086−0.06720.29380.033*
C140.57377 (14)−0.07296 (19)0.22355 (12)0.0252 (4)
H140.5682−0.1610.22360.03*
C150.49862 (13)−0.00043 (17)0.18183 (11)0.0205 (4)
H150.4418−0.03910.15370.025*
C160.11816 (12)−0.00936 (16)−0.01969 (11)0.0161 (4)
C170.05536 (12)0.05557 (16)−0.08338 (11)0.0179 (4)
C180.05763 (12)0.18349 (16)−0.09553 (10)0.0159 (4)
C190.11005 (12)−0.14649 (16)−0.01373 (10)0.0157 (4)
C200.18785 (12)−0.21569 (16)0.02779 (10)0.0172 (4)
H200.2441−0.17450.05390.021*
C210.18344 (13)−0.34458 (17)0.03109 (11)0.0191 (4)
H210.2367−0.39110.05920.023*
C220.10189 (13)−0.40532 (17)−0.00637 (11)0.0209 (4)
H220.0993−0.4936−0.00490.025*
C230.02358 (13)−0.33711 (17)−0.04628 (11)0.0213 (4)
H23−0.0327−0.3787−0.07110.026*
C240.02754 (12)−0.20826 (16)−0.04996 (11)0.0178 (4)
H24−0.0261−0.162−0.07720.021*
C25−0.01309 (12)0.24140 (16)−0.16673 (11)0.0173 (4)
C26−0.05067 (12)0.17798 (17)−0.23829 (11)0.0200 (4)
H26−0.03380.0942−0.24170.024*
C27−0.11255 (13)0.23700 (19)−0.30452 (11)0.0237 (4)
H27−0.13690.1943−0.35340.028*
C28−0.13888 (13)0.35818 (19)−0.29931 (12)0.0253 (4)
H28−0.18160.3982−0.34460.03*
C29−0.10314 (13)0.42114 (18)−0.22823 (12)0.0255 (4)
H29−0.12220.5036−0.22450.031*
C30−0.03947 (12)0.36340 (17)−0.16254 (11)0.0211 (4)
H30−0.01370.4076−0.11420.025*
C310.33537 (13)0.05156 (17)−0.04292 (12)0.0227 (4)
H31A0.3045−0.0252−0.03930.034*
H31B0.39280.05840.00310.034*
H31C0.34710.0497−0.09090.034*
C320.17157 (17)0.2844 (3)−0.21685 (16)0.0405 (6)
C330.24944 (16)−0.0441 (2)0.22012 (13)0.0351 (5)
H33A0.2382−0.0780.26450.053*
H33B0.264−0.11220.1920.053*
H33C0.1953−0.00060.18420.053*
O10.19196 (8)0.26454 (12)0.11198 (8)0.0212 (3)
O20.28326 (8)0.37464 (11)0.03141 (7)0.0186 (3)
O30.34775 (8)0.15408 (11)0.11931 (7)0.0182 (3)
O40.18704 (8)0.04098 (11)0.03497 (7)0.0188 (3)
O50.11722 (8)0.25860 (11)−0.04987 (7)0.0181 (3)
O60.27966 (9)0.15603 (13)−0.04550 (8)0.0239 (3)
O70.26609 (11)0.29178 (17)−0.16870 (10)0.0416 (4)
O80.32366 (10)0.04114 (15)0.24890 (9)0.0311 (3)
V10.22608 (2)0.21767 (3)0.046818 (18)0.01557 (9)
H20.4932 (14)0.3447 (18)0.1177 (11)0.017 (5)*
H6A0.2815 (17)0.203 (2)−0.0798 (15)0.041 (7)*
H7A0.2918 (18)0.340 (3)−0.1908 (16)0.052 (8)*
H8A0.3325 (19)0.078 (3)0.2091 (18)0.065 (9)*
H170.0095 (13)0.0099 (18)−0.1201 (12)0.018 (5)*
H32A0.1461 (18)0.210 (2)−0.1987 (15)0.049 (7)*
H32B0.1601 (19)0.273 (3)−0.2725 (19)0.066 (9)*
H32C0.1388 (17)0.365 (2)−0.2115 (15)0.045 (7)*
U11U22U33U12U13U23
C10.0170 (9)0.0157 (8)0.0157 (9)−0.0014 (7)0.0065 (7)−0.0038 (7)
C20.0115 (9)0.0199 (9)0.0188 (9)−0.0003 (7)0.0044 (7)−0.0004 (7)
C30.0156 (9)0.0194 (9)0.0144 (9)0.0002 (7)0.0049 (7)−0.0023 (7)
C40.0149 (9)0.0147 (8)0.0223 (9)0.0013 (7)0.0091 (8)−0.0006 (7)
C50.0154 (9)0.0204 (9)0.0238 (10)−0.0005 (7)0.0074 (8)−0.0007 (8)
C60.0203 (10)0.0221 (9)0.0266 (10)0.0050 (8)0.0107 (8)0.0062 (8)
C70.0243 (10)0.0169 (9)0.0342 (11)0.0005 (8)0.0173 (9)0.0025 (8)
C80.0222 (10)0.0211 (9)0.0301 (11)−0.0057 (8)0.0100 (9)−0.0044 (8)
C90.0216 (10)0.0208 (9)0.0203 (10)−0.0014 (8)0.0056 (8)−0.0010 (7)
C100.0161 (9)0.0209 (9)0.0155 (9)0.0028 (7)0.0057 (7)0.0029 (7)
C110.0199 (10)0.0251 (9)0.0197 (10)0.0005 (8)0.0046 (8)0.0049 (8)
C120.0173 (10)0.0373 (12)0.0226 (10)0.0020 (9)0.0027 (8)0.0070 (9)
C130.0238 (10)0.0364 (11)0.0225 (10)0.0135 (9)0.0086 (9)0.0113 (9)
C140.0306 (11)0.0234 (10)0.0227 (10)0.0067 (8)0.0119 (9)0.0064 (8)
C150.0201 (9)0.0225 (9)0.0172 (9)0.0014 (8)0.0057 (8)0.0020 (7)
C160.0137 (8)0.0160 (8)0.0189 (9)−0.0006 (7)0.0070 (7)−0.0018 (7)
C170.0162 (9)0.0159 (8)0.0178 (9)−0.0017 (7)0.0028 (8)−0.0024 (7)
C180.0136 (8)0.0189 (8)0.0149 (9)0.0012 (7)0.0053 (7)−0.0017 (7)
C190.0180 (9)0.0145 (8)0.0148 (9)0.0004 (7)0.0067 (7)0.0000 (7)
C200.0156 (9)0.0186 (8)0.0160 (9)−0.0013 (7)0.0049 (7)−0.0009 (7)
C210.0200 (9)0.0187 (9)0.0199 (9)0.0055 (7)0.0091 (8)0.0037 (7)
C220.0270 (10)0.0147 (8)0.0224 (10)−0.0009 (8)0.0112 (8)0.0015 (7)
C230.0208 (9)0.0192 (9)0.0238 (10)−0.0042 (8)0.0090 (8)−0.0010 (8)
C240.0167 (9)0.0182 (8)0.0180 (9)0.0016 (7)0.0065 (7)0.0006 (7)
C250.0142 (9)0.0178 (8)0.0176 (9)−0.0004 (7)0.0040 (7)0.0016 (7)
C260.0178 (9)0.0194 (9)0.0213 (10)−0.0010 (7)0.0064 (8)−0.0011 (7)
C270.0181 (10)0.0332 (11)0.0166 (9)−0.0029 (8)0.0036 (8)0.0004 (8)
C280.0179 (9)0.0318 (11)0.0222 (10)0.0022 (8)0.0038 (8)0.0095 (8)
C290.0223 (10)0.0201 (9)0.0296 (11)0.0048 (8)0.0058 (9)0.0061 (8)
C300.0192 (9)0.0196 (9)0.0203 (10)0.0002 (7)0.0036 (8)0.0001 (7)
C310.0214 (10)0.0191 (9)0.0273 (10)0.0017 (8)0.0095 (8)−0.0016 (8)
C320.0373 (14)0.0536 (16)0.0319 (13)−0.0119 (12)0.0153 (11)−0.0011 (12)
C330.0395 (13)0.0309 (11)0.0319 (12)−0.0014 (10)0.0111 (10)0.0019 (9)
O10.0164 (6)0.0228 (7)0.0219 (7)−0.0014 (5)0.0050 (6)−0.0022 (5)
O20.0136 (6)0.0157 (6)0.0228 (7)−0.0008 (5)0.0035 (5)−0.0003 (5)
O30.0140 (6)0.0173 (6)0.0200 (7)−0.0010 (5)0.0034 (5)0.0016 (5)
O40.0170 (6)0.0152 (6)0.0184 (7)−0.0024 (5)0.0009 (5)0.0010 (5)
O50.0153 (6)0.0155 (6)0.0188 (7)−0.0003 (5)0.0019 (5)−0.0004 (5)
O60.0289 (8)0.0198 (7)0.0249 (7)0.0063 (6)0.0129 (6)0.0057 (6)
O70.0356 (9)0.0487 (10)0.0377 (10)−0.0030 (8)0.0115 (8)0.0180 (8)
O80.0288 (8)0.0391 (9)0.0259 (8)0.0001 (7)0.0113 (7)0.0019 (7)
V10.01259 (15)0.01394 (14)0.01701 (16)−0.00089 (12)0.00259 (12)−0.00022 (12)
C1—O21.278 (2)C21—C221.382 (3)
C1—C21.404 (2)C21—H210.95
C1—C41.488 (2)C22—C231.391 (3)
C2—C31.383 (3)C22—H220.95
C2—H20.88 (2)C23—C241.389 (2)
C3—O31.298 (2)C23—H230.95
C3—O31.298 (2)C24—H240.95
C3—C101.487 (2)C25—C301.390 (2)
C4—C51.391 (3)C25—C261.396 (3)
C4—C91.398 (3)C26—C271.388 (3)
C5—C61.387 (3)C26—H260.95
C5—H50.95C27—C281.385 (3)
C6—C71.383 (3)C27—H270.95
C6—H60.95C28—C291.385 (3)
C7—C81.383 (3)C28—H280.95
C7—H70.95C29—C301.387 (3)
C8—C91.393 (3)C29—H290.95
C8—H80.95C30—H300.95
C9—H90.95C31—O61.427 (2)
C10—C111.397 (3)C31—H31A0.98
C10—C151.398 (2)C31—H31B0.98
C11—C121.389 (3)C31—H31C0.98
C11—H110.95C32—O71.429 (3)
C12—C131.385 (3)C32—O71.429 (3)
C12—H120.95C32—H32A1.02 (3)
C13—C141.391 (3)C32—H32B0.98 (3)
C13—H130.95C32—H32C1.04 (3)
C14—C151.388 (3)C33—O81.431 (3)
C14—H140.95C33—H33A0.98
C15—H150.95C33—H33B0.98
C16—O41.286 (2)C33—H33C0.98
C16—C171.397 (2)O1—V11.5965 (13)
C16—C191.487 (2)O2—V11.9972 (12)
C17—C181.396 (2)O3—V12.0045 (12)
C17—H170.92 (2)O4—V11.9847 (12)
C18—O51.281 (2)O5—V11.9935 (12)
C18—C251.492 (2)O6—V12.3020 (15)
C19—C201.396 (2)O6—H6A0.82 (3)
C19—C241.396 (2)O7—H7A0.87 (3)
C20—C211.389 (2)O8—H8A0.90 (3)
C20—H200.95V1—O32.0045 (12)
O2—C1—C2124.94 (16)C23—C24—H24119.9
O2—C1—C4115.89 (15)C19—C24—H24119.9
C2—C1—C4119.16 (16)C30—C25—C26119.14 (17)
C3—C2—C1125.94 (17)C30—C25—C18119.14 (16)
C3—C2—H2116.6 (13)C26—C25—C18121.66 (16)
C1—C2—H2117.4 (13)C27—C26—C25120.20 (17)
O3—C3—C2124.48 (16)C27—C26—H26119.9
O3—C3—C2124.48 (16)C25—C26—H26119.9
O3—C3—C10115.71 (15)C28—C27—C26120.01 (18)
O3—C3—C10115.71 (15)C28—C27—H27120
C2—C3—C10119.79 (16)C26—C27—H27120
C5—C4—C9119.63 (17)C27—C28—C29120.19 (18)
C5—C4—C1119.09 (16)C27—C28—H28119.9
C9—C4—C1121.27 (16)C29—C28—H28119.9
C6—C5—C4120.29 (17)C28—C29—C30119.81 (18)
C6—C5—H5119.9C28—C29—H29120.1
C4—C5—H5119.9C30—C29—H29120.1
C7—C6—C5119.86 (18)C29—C30—C25120.60 (18)
C7—C6—H6120.1C29—C30—H30119.7
C5—C6—H6120.1C25—C30—H30119.7
C6—C7—C8120.56 (18)O6—C31—H31A109.5
C6—C7—H7119.7O6—C31—H31B109.5
C8—C7—H7119.7H31A—C31—H31B109.5
C7—C8—C9119.92 (18)O6—C31—H31C109.5
C7—C8—H8120H31A—C31—H31C109.5
C9—C8—H8120H31B—C31—H31C109.5
C8—C9—C4119.74 (18)O7—C32—H32A108.0 (15)
C8—C9—H9120.1O7—C32—H32A108.0 (15)
C4—C9—H9120.1O7—C32—H32B111.6 (17)
C11—C10—C15118.96 (17)O7—C32—H32B111.6 (17)
C11—C10—C3121.47 (16)H32A—C32—H32B109 (2)
C15—C10—C3119.55 (16)O7—C32—H32C110.7 (14)
C12—C11—C10120.26 (18)O7—C32—H32C110.7 (14)
C12—C11—H11119.9H32A—C32—H32C110 (2)
C10—C11—H11119.9H32B—C32—H32C108 (2)
C13—C12—C11120.54 (19)O8—C33—H33A109.5
C13—C12—H12119.7O8—C33—H33B109.5
C11—C12—H12119.7H33A—C33—H33B109.5
C12—C13—C14119.54 (18)O8—C33—H33C109.5
C12—C13—H13120.2H33A—C33—H33C109.5
C14—C13—H13120.2H33B—C33—H33C109.5
C15—C14—C13120.31 (18)C1—O2—V1127.28 (11)
C15—C14—H14119.8C3—O3—V1126.95 (11)
C13—C14—H14119.8C16—O4—V1128.73 (11)
C14—C15—C10120.38 (18)C18—O5—V1127.87 (11)
C14—C15—H15119.8C31—O6—V1128.35 (12)
C10—C15—H15119.8C31—O6—H6A107.1 (18)
O4—C16—C17124.21 (16)V1—O6—H6A122.5 (18)
O4—C16—C19115.61 (15)C32—O7—H7A109.3 (18)
C17—C16—C19120.13 (16)C33—O8—H8A111.0 (19)
C18—C17—C16124.84 (17)O1—V1—O4101.25 (6)
C18—C17—H17118.1 (12)O1—V1—O599.43 (6)
C16—C17—H17117.1 (12)O4—V1—O589.13 (5)
O5—C18—C17125.10 (16)O1—V1—O299.25 (6)
O5—C18—C25115.35 (15)O4—V1—O2159.47 (6)
C17—C18—C25119.55 (16)O5—V1—O288.66 (5)
C20—C19—C24119.11 (16)O1—V1—O398.18 (6)
C20—C19—C16118.82 (16)O4—V1—O386.02 (5)
C24—C19—C16122.05 (16)O5—V1—O3162.32 (5)
C21—C20—C19120.30 (17)O2—V1—O389.94 (5)
C21—C20—H20119.8O1—V1—O398.18 (6)
C19—C20—H20119.8O4—V1—O386.02 (5)
C22—C21—C20120.26 (17)O5—V1—O3162.32 (5)
C22—C21—H21119.9O2—V1—O389.94 (5)
C20—C21—H21119.9O3—V1—O30.00 (12)
C21—C22—C23119.92 (17)O1—V1—O6177.74 (6)
C21—C22—H22120O4—V1—O680.77 (5)
C23—C22—H22120O5—V1—O681.56 (5)
C24—C23—C22120.10 (17)O2—V1—O678.71 (5)
C24—C23—H23120O3—V1—O680.89 (5)
C22—C23—H23120O3—V1—O680.89 (5)
C23—C24—C19120.27 (17)
D—H···AD—HH···AD···AD—H···A
O6—H6A···O70.82 (3)1.83 (3)2.644 (2)169 (3)
O7—H7A···O8i0.87 (3)1.90 (3)2.749 (2)168 (3)
O8—H8A···O30.90 (3)1.96 (3)2.853 (2)178 (3)
C13—H13···O1ii0.952.583.487 (2)160
C32—H32B···O1i0.98 (3)2.43 (3)3.360 (3)159 (2)
Table 1

Selected bond lengths (Å)

O1—V11.5965 (13)
O2—V11.9972 (12)
O3—V12.0045 (12)
O4—V11.9847 (12)
O5—V11.9935 (12)
O6—V12.3020 (15)
Table 2

Hydrogen-bond geometry (Å, °)

D—H⋯A D—HH⋯A DA D—H⋯A
O6—H6A⋯O70.82 (3)1.83 (3)2.644 (2)169 (3)
O7—H7A⋯O8i 0.87 (3)1.90 (3)2.749 (2)168 (3)
O8—H8A⋯O30.90 (3)1.96 (3)2.853 (2)178 (3)
C13—H13⋯O1ii 0.952.583.487 (2)160
C32—H32B⋯O1i 0.98 (3)2.43 (3)3.360 (3)159 (2)

Symmetry codes: (i) ; (ii) .

  3 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  Site-selective DNA photocleavage involving unusual photoinitiated tautomerization of chiral tridentate vanadyl(V) complexes derived from N-salicylidene alpha-amino acids.

Authors:  Chien-Tien Chen; Jin-Sheng Lin; Jen-Huang Kuo; Shiue-Shien Weng; Ting-Shen Cuo; Yi-Wen Lin; Chien-Chung Cheng; Yan-Chen Huang; Jen-Kan Yu; Pi-Tai Chou
Journal:  Org Lett       Date:  2004-11-25       Impact factor: 6.005

3.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  3 in total

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