Literature DB >> 21754533

N-[Bis(dimethyl-amino)-methyl-idene]-2-[(triphenyl-meth-yl)sulfan-yl]ethanaminium hexa-fluoro-phosphate.

Adam Neuba1, Ulrich Flörke, Gerald Henkel.   

Abstract

The mol-ecular structure of the title compound, C(26)H(32)N(3)S(+)·PF(6) (-), shows a protonated guanidyl group bridged by an ethyl-ene linker with a tritylsulfanyl unit. The guanidinium (gua) unit displays charge delocalization over the three N-C(gua) bonds. The N-C-C-S group shows a folded nonplanar conformation with a torsion angle of 158.4 (1)°. In the crystal, the cation and anion are linked by an N-H⋯F inter-action.

Entities:  

Year:  2011        PMID: 21754533      PMCID: PMC3089070          DOI: 10.1107/S1600536811014929

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


Related literature

For the synthesis, see: Herres-Pawlis et al. (2005 ▶). For related structures, see: Flörke et al. (2006 ▶); Neuba et al. (2007c ▶); Pruszynski et al. (1992 ▶). For related chemistry literature, see: Börner et al. (2007 ▶, 2009 ▶); Galezowski et al. (1994 ▶); Harmjanz (1997 ▶); Herres et al. (2005 ▶); Herres-Pawlis et al. (2009 ▶); Neuba (2009 ▶); Neuba et al. (2007a ▶,b ▶, 2008a ▶,b ▶, 2010 ▶, 2011 ▶); Peters et al. (2008 ▶); Pohl et al. (2000 ▶); Raab et al. (2003 ▶); Schneider (2000 ▶); Waden (1999 ▶); Wittman (1999 ▶); Wittmann et al. (2001 ▶).

Experimental

Crystal data

C26H32N3SPF6 M = 563.58 Triclinic, a = 9.0111 (14) Å b = 9.1376 (15) Å c = 17.564 (3) Å α = 96.532 (3)° β = 100.225 (4)° γ = 108.053 (3)° V = 1331.0 (4) Å3 Z = 2 Mo Kα radiation μ = 0.25 mm−1 T = 120 K 0.33 × 0.30 × 0.26 mm

Data collection

Bruker SMART APEX diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 2004 ▶) T min = 0.924, T max = 0.939 11922 measured reflections 6281 independent reflections 4547 reflections with I > 2σ(I) R int = 0.060

Refinement

R[F 2 > 2σ(F 2)] = 0.047 wR(F 2) = 0.104 S = 0.96 6281 reflections 338 parameters H-atom parameters constrained Δρmax = 0.38 e Å−3 Δρmin = −0.42 e Å−3 Data collection: SMART (Bruker, 2002 ▶); cell refinement: SAINT (Bruker, 2002 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and local programs. Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811014929/bt5504sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536811014929/bt5504Isup2.hkl Supplementary material file. DOI: 10.1107/S1600536811014929/bt5504Isup3.cml Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C26H32N3S+·PF6Z = 2
Mr = 563.58F(000) = 588
Triclinic, P1Dx = 1.406 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 9.0111 (14) ÅCell parameters from 786 reflections
b = 9.1376 (15) Åθ = 2.4–27.9°
c = 17.564 (3) ŵ = 0.25 mm1
α = 96.532 (3)°T = 120 K
β = 100.225 (4)°Block, colourless
γ = 108.053 (3)°0.33 × 0.30 × 0.26 mm
V = 1331.0 (4) Å3
Bruker SMART APEX diffractometer6281 independent reflections
Radiation source: sealed tube4547 reflections with I > 2σ(I)
graphiteRint = 0.060
φ and ω scansθmax = 27.9°, θmin = 2.4°
Absorption correction: multi-scan (SADABS; Sheldrick, 2004)h = −11→10
Tmin = 0.924, Tmax = 0.939k = −12→11
11922 measured reflectionsl = −23→20
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.047Hydrogen site location: difference Fourier map
wR(F2) = 0.104H-atom parameters constrained
S = 0.96w = 1/[σ2(Fo2) + (0.0445P)2] where P = (Fo2 + 2Fc2)/3
6281 reflections(Δ/σ)max < 0.001
338 parametersΔρmax = 0.38 e Å3
0 restraintsΔρmin = −0.42 e Å3
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'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 > σ(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
S10.77994 (6)0.61888 (5)0.29140 (3)0.02002 (12)
N10.6327 (2)0.89606 (18)0.43688 (9)0.0242 (4)
H1A0.62890.88500.48570.029*
N20.7383 (2)1.16512 (18)0.47245 (9)0.0253 (4)
N30.5695 (2)1.05179 (18)0.34970 (9)0.0252 (4)
C10.6470 (2)1.0380 (2)0.41911 (10)0.0211 (4)
C20.7029 (3)1.3121 (2)0.47981 (13)0.0378 (6)
H2A0.78401.39220.46250.057*
H2B0.70421.34710.53480.057*
H2C0.59691.29480.44700.057*
C30.8710 (3)1.1626 (3)0.53285 (12)0.0338 (5)
H3A0.83411.14320.58120.051*
H3B0.95781.26360.54340.051*
H3C0.91021.07920.51450.051*
C40.6343 (3)1.1837 (3)0.31065 (13)0.0407 (6)
H4A0.57371.25560.31450.061*
H4B0.62521.14430.25510.061*
H4C0.74731.23900.33620.061*
C50.4191 (3)0.9342 (3)0.30549 (12)0.0350 (5)
H5A0.43960.87170.26190.052*
H5B0.34470.98620.28450.052*
H5C0.37200.86570.34030.052*
C60.6227 (2)0.7568 (2)0.38190 (11)0.0245 (4)
H6A0.51290.71090.34850.029*
H6B0.64300.67750.41240.029*
C70.7419 (2)0.7943 (2)0.32952 (11)0.0207 (4)
H7A0.84370.87380.36010.025*
H7B0.69890.83840.28520.025*
C80.7037 (2)0.5855 (2)0.18294 (10)0.0173 (4)
C110.6980 (2)0.4160 (2)0.15696 (10)0.0177 (4)
C120.8390 (2)0.3816 (2)0.17641 (11)0.0226 (4)
H12A0.93330.46110.20680.027*
C130.8442 (2)0.2340 (2)0.15229 (12)0.0269 (4)
H13A0.94120.21270.16640.032*
C140.7079 (3)0.1177 (2)0.10767 (11)0.0270 (5)
H14A0.71090.01640.09060.032*
C150.5672 (3)0.1497 (2)0.08807 (11)0.0266 (4)
H15A0.47320.06970.05780.032*
C160.5622 (2)0.2984 (2)0.11234 (11)0.0220 (4)
H16A0.46490.31920.09820.026*
C210.5359 (2)0.5994 (2)0.16573 (10)0.0172 (4)
C220.4204 (2)0.5180 (2)0.20308 (10)0.0206 (4)
H22A0.44750.45670.23990.025*
C230.2669 (2)0.5248 (2)0.18760 (11)0.0230 (4)
H23A0.19000.46850.21380.028*
C240.2246 (2)0.6135 (2)0.13396 (11)0.0237 (4)
H24A0.11920.61810.12330.028*
C250.3372 (2)0.6948 (2)0.09638 (11)0.0235 (4)
H25A0.30920.75580.05960.028*
C260.4920 (2)0.6881 (2)0.11204 (11)0.0208 (4)
H26A0.56860.74480.08580.025*
C310.8208 (2)0.6940 (2)0.14281 (10)0.0183 (4)
C320.8071 (2)0.6503 (2)0.06202 (11)0.0231 (4)
H32A0.72570.55650.03380.028*
C330.9100 (2)0.7415 (2)0.02285 (11)0.0268 (4)
H33A0.89890.7100−0.03190.032*
C341.0294 (2)0.8785 (2)0.06290 (12)0.0259 (4)
H34A1.10110.94060.03610.031*
C351.0432 (2)0.9240 (2)0.14238 (12)0.0252 (4)
H35A1.12401.01850.17010.030*
C360.9401 (2)0.8329 (2)0.18186 (11)0.0216 (4)
H36A0.95120.86580.23650.026*
P10.19146 (7)0.27386 (6)0.37421 (3)0.02543 (13)
F10.02793 (18)0.13314 (18)0.35865 (10)0.0699 (5)
F20.20703 (19)0.22909 (16)0.28687 (7)0.0526 (4)
F30.35707 (17)0.41217 (16)0.39103 (9)0.0547 (4)
F40.10033 (18)0.38923 (16)0.34893 (8)0.0531 (4)
F50.18070 (19)0.31694 (17)0.46304 (8)0.0524 (4)
F60.28644 (18)0.15713 (16)0.40077 (7)0.0472 (4)
U11U22U33U12U13U23
S10.0229 (3)0.0197 (2)0.0182 (2)0.0101 (2)0.00173 (19)0.00234 (17)
N10.0361 (10)0.0218 (8)0.0170 (8)0.0095 (8)0.0118 (7)0.0047 (6)
N20.0275 (10)0.0227 (8)0.0245 (9)0.0083 (7)0.0052 (7)0.0003 (7)
N30.0312 (10)0.0246 (9)0.0219 (8)0.0126 (8)0.0058 (7)0.0043 (7)
C10.0222 (11)0.0251 (10)0.0198 (9)0.0107 (8)0.0100 (8)0.0032 (8)
C20.0447 (15)0.0216 (11)0.0446 (14)0.0110 (10)0.0088 (11)−0.0019 (9)
C30.0299 (12)0.0375 (12)0.0279 (11)0.0083 (10)0.0006 (10)−0.0007 (9)
C40.0584 (17)0.0377 (13)0.0347 (12)0.0214 (12)0.0157 (12)0.0186 (10)
C50.0346 (13)0.0395 (13)0.0291 (11)0.0195 (11)−0.0029 (10)−0.0047 (9)
C60.0339 (12)0.0191 (9)0.0225 (10)0.0103 (9)0.0093 (9)0.0031 (7)
C70.0222 (10)0.0161 (9)0.0232 (10)0.0066 (8)0.0045 (8)0.0026 (7)
C80.0179 (10)0.0160 (9)0.0159 (9)0.0045 (8)0.0018 (7)0.0019 (7)
C110.0207 (10)0.0170 (9)0.0168 (9)0.0068 (8)0.0064 (8)0.0045 (7)
C120.0195 (10)0.0198 (9)0.0273 (10)0.0057 (8)0.0054 (8)0.0022 (8)
C130.0281 (12)0.0250 (10)0.0328 (11)0.0137 (9)0.0100 (9)0.0067 (8)
C140.0374 (13)0.0169 (9)0.0292 (11)0.0108 (9)0.0122 (10)0.0018 (8)
C150.0295 (12)0.0208 (10)0.0234 (10)0.0012 (9)0.0066 (9)−0.0008 (8)
C160.0215 (11)0.0224 (10)0.0204 (9)0.0069 (8)0.0026 (8)0.0020 (7)
C210.0168 (10)0.0149 (8)0.0173 (9)0.0054 (7)−0.0001 (7)−0.0014 (7)
C220.0227 (11)0.0200 (9)0.0211 (10)0.0091 (8)0.0044 (8)0.0065 (7)
C230.0192 (10)0.0227 (10)0.0270 (10)0.0055 (8)0.0068 (8)0.0061 (8)
C240.0173 (10)0.0258 (10)0.0287 (11)0.0100 (8)0.0033 (8)0.0033 (8)
C250.0248 (11)0.0229 (10)0.0250 (10)0.0115 (9)0.0029 (9)0.0077 (8)
C260.0210 (10)0.0191 (9)0.0230 (10)0.0070 (8)0.0052 (8)0.0057 (7)
C310.0173 (10)0.0179 (9)0.0228 (9)0.0094 (8)0.0046 (8)0.0052 (7)
C320.0210 (10)0.0216 (9)0.0246 (10)0.0057 (8)0.0023 (8)0.0044 (8)
C330.0290 (12)0.0313 (11)0.0226 (10)0.0114 (10)0.0068 (9)0.0098 (8)
C340.0246 (11)0.0262 (10)0.0336 (11)0.0122 (9)0.0110 (9)0.0155 (9)
C350.0190 (10)0.0175 (9)0.0375 (12)0.0047 (8)0.0041 (9)0.0061 (8)
C360.0197 (10)0.0200 (9)0.0253 (10)0.0078 (8)0.0044 (8)0.0033 (8)
P10.0307 (3)0.0207 (3)0.0231 (3)0.0066 (2)0.0047 (2)0.0047 (2)
F10.0451 (10)0.0428 (9)0.0994 (13)−0.0102 (7)0.0113 (9)0.0027 (9)
F20.0916 (12)0.0495 (9)0.0248 (7)0.0340 (9)0.0148 (7)0.0079 (6)
F30.0403 (9)0.0380 (8)0.0720 (10)−0.0026 (7)0.0121 (8)0.0015 (7)
F40.0661 (11)0.0509 (9)0.0512 (9)0.0377 (8)0.0019 (8)0.0112 (7)
F50.0803 (11)0.0580 (9)0.0337 (7)0.0362 (9)0.0256 (7)0.0098 (6)
F60.0765 (11)0.0483 (8)0.0350 (7)0.0411 (8)0.0162 (7)0.0173 (6)
S1—C71.8202 (17)C13—C141.383 (3)
S1—C81.8620 (18)C13—H13A0.9500
N1—C11.341 (2)C14—C151.381 (3)
N1—C61.476 (2)C14—H14A0.9500
N1—H1A0.8800C15—C161.394 (2)
N2—C11.338 (2)C15—H15A0.9500
N2—C31.459 (3)C16—H16A0.9500
N2—C21.470 (2)C21—C221.393 (3)
N3—C11.333 (2)C21—C261.394 (2)
N3—C51.459 (3)C22—C231.384 (3)
N3—C41.469 (3)C22—H22A0.9500
C2—H2A0.9800C23—C241.388 (3)
C2—H2B0.9800C23—H23A0.9500
C2—H2C0.9800C24—C251.378 (3)
C3—H3A0.9800C24—H24A0.9500
C3—H3B0.9800C25—C261.395 (3)
C3—H3C0.9800C25—H25A0.9500
C4—H4A0.9800C26—H26A0.9500
C4—H4B0.9800C31—C361.390 (2)
C4—H4C0.9800C31—C321.402 (2)
C5—H5A0.9800C32—C331.381 (3)
C5—H5B0.9800C32—H32A0.9500
C5—H5C0.9800C33—C341.384 (3)
C6—C71.521 (3)C33—H33A0.9500
C6—H6A0.9900C34—C351.383 (3)
C6—H6B0.9900C34—H34A0.9500
C7—H7A0.9900C35—C361.385 (3)
C7—H7B0.9900C35—H35A0.9500
C8—C211.537 (2)C36—H36A0.9500
C8—C311.538 (2)P1—F41.5801 (13)
C8—C111.546 (2)P1—F31.5814 (14)
C11—C161.386 (3)P1—F11.5819 (15)
C11—C121.396 (3)P1—F21.5842 (13)
C12—C131.385 (2)P1—F51.5924 (13)
C12—H12A0.9500P1—F61.6202 (13)
C7—S1—C8105.13 (8)C14—C13—H13A120.1
C1—N1—C6125.84 (15)C12—C13—H13A120.1
C1—N1—H1A117.1C15—C14—C13119.59 (17)
C6—N1—H1A117.1C15—C14—H14A120.2
C1—N2—C3122.00 (16)C13—C14—H14A120.2
C1—N2—C2122.76 (17)C14—C15—C16120.53 (18)
C3—N2—C2114.95 (16)C14—C15—H15A119.7
C1—N3—C5122.70 (17)C16—C15—H15A119.7
C1—N3—C4121.96 (18)C11—C16—C15120.46 (18)
C5—N3—C4115.28 (17)C11—C16—H16A119.8
N3—C1—N2120.65 (17)C15—C16—H16A119.8
N3—C1—N1120.34 (17)C22—C21—C26117.89 (17)
N2—C1—N1119.01 (17)C22—C21—C8119.67 (15)
N2—C2—H2A109.5C26—C21—C8122.42 (17)
N2—C2—H2B109.5C23—C22—C21121.25 (17)
H2A—C2—H2B109.5C23—C22—H22A119.4
N2—C2—H2C109.5C21—C22—H22A119.4
H2A—C2—H2C109.5C22—C23—C24120.33 (18)
H2B—C2—H2C109.5C22—C23—H23A119.8
N2—C3—H3A109.5C24—C23—H23A119.8
N2—C3—H3B109.5C25—C24—C23119.29 (18)
H3A—C3—H3B109.5C25—C24—H24A120.4
N2—C3—H3C109.5C23—C24—H24A120.4
H3A—C3—H3C109.5C24—C25—C26120.40 (17)
H3B—C3—H3C109.5C24—C25—H25A119.8
N3—C4—H4A109.5C26—C25—H25A119.8
N3—C4—H4B109.5C21—C26—C25120.84 (18)
H4A—C4—H4B109.5C21—C26—H26A119.6
N3—C4—H4C109.5C25—C26—H26A119.6
H4A—C4—H4C109.5C36—C31—C32117.81 (17)
H4B—C4—H4C109.5C36—C31—C8123.97 (16)
N3—C5—H5A109.5C32—C31—C8118.22 (16)
N3—C5—H5B109.5C33—C32—C31121.00 (18)
H5A—C5—H5B109.5C33—C32—H32A119.5
N3—C5—H5C109.5C31—C32—H32A119.5
H5A—C5—H5C109.5C32—C33—C34120.39 (18)
H5B—C5—H5C109.5C32—C33—H33A119.8
N1—C6—C7112.59 (15)C34—C33—H33A119.8
N1—C6—H6A109.1C35—C34—C33119.25 (18)
C7—C6—H6A109.1C35—C34—H34A120.4
N1—C6—H6B109.1C33—C34—H34A120.4
C7—C6—H6B109.1C34—C35—C36120.53 (18)
H6A—C6—H6B107.8C34—C35—H35A119.7
C6—C7—S1110.58 (12)C36—C35—H35A119.7
C6—C7—H7A109.5C35—C36—C31121.02 (18)
S1—C7—H7A109.5C35—C36—H36A119.5
C6—C7—H7B109.5C31—C36—H36A119.5
S1—C7—H7B109.5F4—P1—F390.03 (8)
H7A—C7—H7B108.1F4—P1—F191.33 (9)
C21—C8—C31112.93 (14)F3—P1—F1178.58 (9)
C21—C8—C11111.65 (14)F4—P1—F291.47 (8)
C31—C8—C11108.14 (14)F3—P1—F289.85 (8)
C21—C8—S1108.93 (12)F1—P1—F290.54 (9)
C31—C8—S1112.31 (12)F4—P1—F590.31 (8)
C11—C8—S1102.41 (11)F3—P1—F589.46 (8)
C16—C11—C12118.30 (16)F1—P1—F590.11 (9)
C16—C11—C8123.45 (16)F2—P1—F5178.08 (8)
C12—C11—C8118.19 (16)F4—P1—F6179.38 (9)
C13—C12—C11121.31 (18)F3—P1—F689.43 (8)
C13—C12—H12A119.3F1—P1—F689.21 (9)
C11—C12—H12A119.3F2—P1—F688.82 (7)
C14—C13—C12119.82 (18)F5—P1—F689.39 (7)
C5—N3—C1—N2−150.95 (18)C14—C15—C16—C11−0.4 (3)
C4—N3—C1—N232.1 (3)C31—C8—C21—C22−174.76 (15)
C5—N3—C1—N128.1 (3)C11—C8—C21—C2263.1 (2)
C4—N3—C1—N1−148.85 (18)S1—C8—C21—C22−49.25 (19)
C3—N2—C1—N3−154.99 (18)C31—C8—C21—C266.9 (2)
C2—N2—C1—N331.5 (3)C11—C8—C21—C26−115.21 (18)
C3—N2—C1—N125.9 (3)S1—C8—C21—C26132.42 (15)
C2—N2—C1—N1−147.63 (19)C26—C21—C22—C230.0 (3)
C6—N1—C1—N337.8 (3)C8—C21—C22—C23−178.44 (16)
C6—N1—C1—N2−143.12 (19)C21—C22—C23—C240.1 (3)
C1—N1—C6—C743.2 (3)C22—C23—C24—C25−0.1 (3)
N1—C6—C7—S1158.36 (13)C23—C24—C25—C260.0 (3)
C8—S1—C7—C6115.92 (14)C22—C21—C26—C250.0 (3)
C7—S1—C8—C21−47.42 (14)C8—C21—C26—C25178.32 (16)
C7—S1—C8—C3178.45 (13)C24—C25—C26—C210.1 (3)
C7—S1—C8—C11−165.77 (12)C21—C8—C31—C36103.47 (19)
C21—C8—C11—C169.8 (2)C11—C8—C31—C36−132.46 (17)
C31—C8—C11—C16−115.03 (19)S1—C8—C31—C36−20.2 (2)
S1—C8—C11—C16126.21 (16)C21—C8—C31—C32−76.83 (19)
C21—C8—C11—C12−173.28 (15)C11—C8—C31—C3247.2 (2)
C31—C8—C11—C1261.9 (2)S1—C8—C31—C32159.51 (14)
S1—C8—C11—C12−56.87 (18)C36—C31—C32—C330.7 (3)
C16—C11—C12—C13−0.3 (3)C8—C31—C32—C33−179.02 (16)
C8—C11—C12—C13−177.34 (17)C31—C32—C33—C340.1 (3)
C11—C12—C13—C140.4 (3)C32—C33—C34—C35−0.8 (3)
C12—C13—C14—C15−0.5 (3)C33—C34—C35—C360.8 (3)
C13—C14—C15—C160.5 (3)C34—C35—C36—C310.0 (3)
C12—C11—C16—C150.3 (3)C32—C31—C36—C35−0.7 (3)
C8—C11—C16—C15177.21 (17)C8—C31—C36—C35178.97 (16)
D—H···AD—HH···AD···AD—H···A
N1—H1A···F6i0.882.132.949 (2)155.
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N1—H1A⋯F6i0.882.132.949 (2)155

Symmetry code: (i) .

  6 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.  The diprotonated 2,2-(propane-1,3-diyl)bis(1,1,3,3-tetramethylguanidinium) cation: packing and conformational changes.

Authors:  Ulrich Flörke; Sonja Herres-Pawlis; Andreas Heuwing; Adam Neuba; Oliver Seewald; Gerald Henkel
Journal:  Acta Crystallogr C       Date:  2006-05-16       Impact factor: 1.172

3.  1,8-bis(dimethylethyleneguanidino)naphthalene: tailoring the basicity of bisguanidine "proton sponges" by experiment and theory.

Authors:  Volker Raab; Klaus Harms; Jörg Sundermeyer; Borislav Kovacević; Zvonimir B Maksić
Journal:  J Org Chem       Date:  2003-11-14       Impact factor: 4.354

4.  Mono- and diprotonation of the superbasic bisguanidine 1,2-Bis(N,N,N',N'-tetramethylguanidino)benzene (btmgb) and Pt II and Pt IV complexes of chelating bisguanidines and guanidinates.

Authors:  Anastasia Peters; Ute Wild; Olaf Hübner; Elisabeth Kaifer; Hans-Jörg Himmel
Journal:  Chemistry       Date:  2008       Impact factor: 5.236

5.  Phenolate hydroxylation in a bis(mu-oxo)dicopper(III) complex: lessons from the guanidine/amine series.

Authors:  Sonja Herres-Pawlis; Pratik Verma; Roxana Haase; Peng Kang; Christopher T Lyons; Erik C Wasinger; Ulrich Flörke; Gerald Henkel; T Daniel P Stack
Journal:  J Am Chem Soc       Date:  2009-01-28       Impact factor: 15.419

6.  Lactide polymerisation with air-stable and highly active zinc complexes with guanidine-pyridine hybrid ligands.

Authors:  Janna Börner; Ulrich Flörke; Klaus Huber; Artjom Döring; Dirk Kuckling; Sonja Herres-Pawlis
Journal:  Chemistry       Date:  2009       Impact factor: 5.236

  6 in total

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