Literature DB >> 24454186

Di-μ-oxido-bis-[bis-(diiso-propyl-aceta-midinato)-κN;κ(2) N,N'-germanium(IV)].

Ronny Syre1, Nancy Frenzel2, Cristian G Hrib1, Edmund P Burte2, Peter G Jones3, Frank T Edelmann1.   

Abstract

The title compound, [Ge2(C8H17N2)4O2], crystallizes with imposed twofold symmetry, which allows the monodentate amidinate ligands to be arranged in a cisoid fashion. The independent Ge-O distances within the central Ge2O2 ring, which is essentially planar (r.m.s. deviation = 0.039 Å), are 1.7797 (8) and 1.8568 (8) Å. The germanium centres adopt a distorted trigonal-bipyramidal geometry, being coordinated by the two O atoms and by one bidentate and one monodentate amidinate ligand (three N atoms). One N-isopropyl group is disordered over two positions; these are mutually exclusive because of 'collisions' between symmetry-equivalent methyl groups and thus each has 0.5 occupancy.

Entities:  

Year:  2013        PMID: 24454186      PMCID: PMC3885011          DOI: 10.1107/S1600536813032133

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


Related literature

For comprehensive reviews on metal amidinates and guanidinates, see: Edelmann (2008 ▶, 2013 ▶). For information on germanium precursors for CVD or ALD production of GST thin layers, see: Chen et al. (2007 ▶, 2009 ▶, 2010 ▶); Lee et al. (2007 ▶). For previous literature on related germanium amidinates, see: Brück et al. (2012 ▶); Cabeza et al. (2013 ▶); Foley et al. (1997 ▶, 2000 ▶); Jones et al. (2008 ▶); Jutzi et al. (1999 ▶); Karsch et al. (1998 ▶); Kühl (2004 ▶); Matioszek et al. (2012 ▶); Yeong et al. (2012 ▶); Zhang & So (2011 ▶).

Experimental

Crystal data

[Ge2(C8H17N2)4O2] M = 742.12 Monoclinic, a = 20.1934 (2) Å b = 12.7424 (1) Å c = 15.9008 (1) Å β = 100.038 (1)° V = 4028.84 (6) Å3 Z = 4 Cu Kα radiation μ = 2.11 mm−1 T = 100 K 0.08 × 0.08 × 0.04 mm

Data collection

Oxford Diffraction Xcalibur (Atlas, Nova) diffractometer Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012 ▶) T min = 0.837, T max = 1.000 35712 measured reflections 4173 independent reflections 4014 reflections with I > 2σ(I) R int = 0.021

Refinement

R[F 2 > 2σ(F 2)] = 0.020 wR(F 2) = 0.057 S = 1.08 4173 reflections 245 parameters 28 restraints H-atom parameters constrained Δρmax = 0.27 e Å−3 Δρmin = −0.29 e Å−3 Data collection: CrysAlis PRO (Agilent, 2012 ▶); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: XP (Siemens, 1994 ▶); software used to prepare material for publication: publCIF (Westrip, 2010 ▶). Crystal structure: contains datablock(s) I, New_Global_Publ_Block. DOI: 10.1107/S1600536813032133/zl2570sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536813032133/zl2570Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
[Ge2(C8H17N2)4O2]F(000) = 1584
Mr = 742.12Dx = 1.224 Mg m3
Monoclinic, C2/cCu Kα radiation, λ = 1.54184 Å
a = 20.1934 (2) ÅCell parameters from 28247 reflections
b = 12.7424 (1) Åθ = 4.1–75.7°
c = 15.9008 (1) ŵ = 2.11 mm1
β = 100.038 (1)°T = 100 K
V = 4028.84 (6) Å3Plate, colourless
Z = 40.08 × 0.08 × 0.04 mm
Oxford Diffraction Xcalibur (Atlas, Nova) diffractometer4173 independent reflections
Radiation source: Nova (Cu) X-ray Source4014 reflections with I > 2σ(I)
Mirror monochromatorRint = 0.021
Detector resolution: 10.3543 pixels mm-1θmax = 75.9°, θmin = 4.1°
ω scanh = −24→25
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012)k = −16→15
Tmin = 0.837, Tmax = 1.000l = −19→19
35712 measured reflections
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.020H-atom parameters constrained
wR(F2) = 0.057w = 1/[σ2(Fo2) + (0.0296P)2 + 2.8972P] where P = (Fo2 + 2Fc2)/3
S = 1.08(Δ/σ)max = 0.002
4173 reflectionsΔρmax = 0.27 e Å3
245 parametersΔρmin = −0.29 e Å3
28 restraintsExtinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.000087 (13)
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*/UeqOcc. (<1)
Ge10.439398 (6)0.244195 (9)0.200846 (8)0.01509 (6)
O10.52408 (4)0.25038 (5)0.18371 (5)0.01763 (17)
N10.37824 (5)0.35942 (7)0.19850 (6)0.01908 (19)
N20.39972 (5)0.30266 (8)0.07745 (6)0.01980 (19)
N30.39391 (5)0.11656 (7)0.19497 (6)0.01919 (19)
C10.36719 (5)0.37371 (9)0.11299 (7)0.0202 (2)
C20.32297 (7)0.45872 (10)0.06893 (8)0.0308 (3)
H2A0.31740.44900.00700.046*0.680 (18)
H2B0.34370.52720.08430.046*0.680 (18)
H2C0.27890.45560.08670.046*0.680 (18)
H2D0.30930.50550.11170.046*0.320 (18)
H2E0.28300.42730.03430.046*0.320 (18)
H2F0.34770.49890.03200.046*0.320 (18)
C30.36233 (6)0.43549 (9)0.26152 (7)0.0231 (2)
H30.32360.47910.23310.028*
C40.42119 (7)0.50889 (11)0.29111 (9)0.0340 (3)
H4A0.45950.46840.32080.051*
H4B0.40810.56150.33010.051*
H4C0.43390.54410.24150.051*
C50.34071 (7)0.37987 (11)0.33699 (8)0.0321 (3)
H5A0.30030.33800.31690.048*
H5B0.33090.43200.37840.048*
H5C0.37700.33370.36430.048*
C60.39731 (7)0.28663 (11)−0.01370 (8)0.0301 (3)
H60.37400.3482−0.04480.036*
C70.46850 (10)0.28230 (19)−0.03182 (10)0.0619 (6)
H7A0.49110.3492−0.01570.093*
H7B0.46730.2695−0.09280.093*
H7C0.49310.22540.00140.093*
C80.35668 (12)0.18830 (13)−0.04264 (10)0.0604 (6)
H8A0.37920.1269−0.01350.091*
H8B0.35320.1799−0.10450.091*
H8C0.31150.1949−0.02850.091*
C90.40646 (6)0.02753 (9)0.15071 (7)0.0216 (2)
C100.47448 (6)0.02267 (9)0.12292 (8)0.0266 (3)
H10A0.5042−0.02440.16100.040*
H10B0.49420.09310.12550.040*
H10C0.4690−0.00390.06430.040*
C110.33400 (6)0.12089 (9)0.23715 (8)0.0236 (2)
H110.33880.18680.27180.028*
C120.33045 (7)0.03191 (13)0.30052 (9)0.0370 (3)
H12A0.3182−0.03350.26920.055*
H12B0.29650.04850.33560.055*
H12C0.37440.02360.33740.055*
C130.26852 (6)0.13273 (11)0.17384 (9)0.0320 (3)
H13A0.27200.19280.13640.048*
H13B0.23140.14420.20500.048*
H13C0.26010.06880.13940.048*
N40.3607 (6)−0.0436 (7)0.1284 (5)0.0219 (13)0.50
C140.3734 (4)−0.1437 (6)0.0885 (4)0.0274 (15)0.50
H140.4104−0.13430.05480.033*0.50
C150.3947 (3)−0.2241 (3)0.1584 (3)0.0514 (9)0.50
H15A0.4348−0.19870.19690.077*0.50
H15B0.4051−0.29070.13270.077*0.50
H15C0.3581−0.23470.19060.077*0.50
C160.30970 (18)−0.1764 (3)0.0291 (2)0.0430 (8)0.50
H16A0.2969−0.1219−0.01420.064*0.50
H16B0.2734−0.18600.06200.064*0.50
H16C0.3176−0.24260.00090.064*0.50
N4'0.3645 (7)−0.0479 (7)0.1505 (5)0.0255 (15)0.50
C14'0.3827 (5)−0.1470 (7)0.1139 (5)0.0335 (16)0.50
H14'0.4326−0.15150.11880.040*0.50
C15'0.3495 (3)−0.1540 (3)0.0203 (3)0.0619 (11)0.50
H15D0.3689−0.1008−0.01260.093*0.50
H15E0.3011−0.14190.01530.093*0.50
H15F0.3573−0.2239−0.00180.093*0.50
C16'0.3578 (3)−0.2357 (3)0.1644 (3)0.0570 (12)0.50
H16D0.3818−0.23370.22360.086*0.50
H16E0.3660−0.30320.13860.086*0.50
H16F0.3094−0.22730.16380.086*0.50
U11U22U33U12U13U23
Ge10.01334 (8)0.01533 (8)0.01667 (8)0.00042 (4)0.00282 (5)−0.00043 (4)
O10.0150 (4)0.0206 (4)0.0175 (4)−0.0007 (3)0.0031 (3)0.0003 (3)
N10.0190 (4)0.0190 (4)0.0191 (4)0.0041 (4)0.0028 (3)−0.0008 (4)
N20.0208 (5)0.0214 (5)0.0169 (4)0.0033 (4)0.0023 (3)0.0011 (3)
N30.0160 (4)0.0183 (4)0.0241 (5)−0.0020 (3)0.0058 (3)−0.0019 (4)
C10.0183 (5)0.0196 (5)0.0220 (5)0.0004 (4)0.0020 (4)0.0006 (4)
C20.0372 (7)0.0278 (6)0.0257 (6)0.0132 (5)0.0012 (5)0.0028 (5)
C30.0237 (6)0.0218 (5)0.0242 (6)0.0063 (4)0.0058 (4)−0.0031 (4)
C40.0377 (7)0.0273 (6)0.0374 (7)−0.0013 (5)0.0074 (6)−0.0128 (5)
C50.0388 (7)0.0322 (7)0.0292 (6)0.0091 (6)0.0164 (5)−0.0014 (5)
C60.0408 (7)0.0322 (7)0.0171 (6)0.0140 (6)0.0041 (5)0.0013 (5)
C70.0561 (11)0.1062 (15)0.0287 (8)0.0446 (11)0.0226 (7)0.0206 (9)
C80.1093 (16)0.0335 (8)0.0285 (7)0.0050 (9)−0.0156 (9)−0.0068 (6)
C90.0202 (5)0.0178 (5)0.0275 (6)0.0012 (4)0.0060 (4)0.0006 (4)
C100.0236 (6)0.0221 (6)0.0362 (7)−0.0009 (5)0.0115 (5)−0.0049 (5)
C110.0190 (5)0.0241 (6)0.0295 (6)−0.0041 (4)0.0092 (4)−0.0043 (5)
C120.0257 (6)0.0545 (9)0.0320 (7)−0.0064 (6)0.0087 (5)0.0118 (6)
C130.0184 (6)0.0322 (7)0.0458 (8)0.0016 (5)0.0067 (5)0.0079 (6)
N40.0254 (19)0.0206 (16)0.023 (3)−0.0030 (12)0.012 (3)−0.005 (2)
C140.032 (3)0.0166 (16)0.037 (4)−0.0058 (15)0.015 (3)−0.012 (2)
C150.066 (3)0.0216 (16)0.069 (3)0.0049 (18)0.021 (2)−0.0015 (16)
C160.0405 (18)0.0405 (18)0.0509 (18)−0.0121 (14)0.0162 (15)−0.0264 (14)
N4'0.034 (2)0.0169 (16)0.029 (4)−0.0040 (12)0.014 (3)−0.006 (2)
C14'0.035 (3)0.028 (2)0.040 (4)−0.0088 (17)0.013 (3)−0.016 (2)
C15'0.072 (3)0.045 (2)0.064 (3)−0.003 (2)0.002 (2)−0.0315 (19)
C16'0.074 (3)0.0186 (15)0.088 (3)−0.0006 (18)0.041 (3)−0.0027 (15)
Ge1—O11.7797 (8)C8—H8C0.9800
Ge1—O1i1.8568 (8)C9—N4'1.281 (12)
Ge1—N31.8621 (9)C9—N41.299 (12)
Ge1—N11.9148 (9)C9—C101.5157 (15)
Ge1—N22.1211 (9)C10—H10A0.9800
O1—Ge1i1.8568 (8)C10—H10B0.9800
N1—C11.3512 (14)C10—H10C0.9800
N1—C31.4694 (14)C11—C131.5234 (17)
N2—C11.3038 (15)C11—C121.5268 (18)
N2—C61.4560 (14)C11—H111.0000
N3—C91.3816 (14)C12—H12A0.9800
N3—C111.4831 (14)C12—H12B0.9800
C1—C21.4978 (16)C12—H12C0.9800
C2—H2A0.9800C13—H13A0.9800
C2—H2B0.9800C13—H13B0.9800
C2—H2C0.9800C13—H13C0.9800
C2—H2D0.9800N4—C141.467 (9)
C2—H2E0.9800C14—C161.516 (7)
C2—H2F0.9800C14—C151.517 (7)
C3—C41.5211 (17)C14—H141.0000
C3—C51.5218 (17)C15—H15A0.9800
C3—H31.0000C15—H15B0.9800
C4—H4A0.9800C15—H15C0.9800
C4—H4B0.9800C16—H16A0.9800
C4—H4C0.9800C16—H16B0.9800
C5—H5A0.9800C16—H16C0.9800
C5—H5B0.9800N4'—C14'1.463 (9)
C5—H5C0.9800C14'—C16'1.522 (9)
C6—C71.516 (2)C14'—C15'1.524 (7)
C6—C81.524 (2)C14'—H14'1.0000
C6—H61.0000C15'—H15D0.9800
C7—H7A0.9800C15'—H15E0.9800
C7—H7B0.9800C15'—H15F0.9800
C7—H7C0.9800C16'—H16D0.9800
C8—H8A0.9800C16'—H16E0.9800
C8—H8B0.9800C16'—H16F0.9800
O1—Ge1—O1i85.57 (4)H7A—C7—H7C109.5
O1—Ge1—N3120.65 (4)H7B—C7—H7C109.5
O1i—Ge1—N3101.19 (4)C6—C8—H8A109.5
O1—Ge1—N1126.64 (4)C6—C8—H8B109.5
O1i—Ge1—N197.49 (4)H8A—C8—H8B109.5
N3—Ge1—N1110.97 (4)C6—C8—H8C109.5
O1—Ge1—N293.50 (4)H8A—C8—H8C109.5
O1i—Ge1—N2157.00 (3)H8B—C8—H8C109.5
N3—Ge1—N299.02 (4)N4'—C9—N3116.0 (5)
N1—Ge1—N264.80 (4)N4—C9—N3121.8 (5)
Ge1—O1—Ge1i94.21 (4)N4'—C9—C10126.9 (5)
C1—N1—C3125.44 (9)N4—C9—C10122.0 (5)
C1—N1—Ge196.65 (7)N3—C9—C10115.98 (10)
C3—N1—Ge1135.19 (7)C9—C10—H10A109.5
C1—N2—C6126.65 (10)C9—C10—H10B109.5
C1—N2—Ge188.89 (7)H10A—C10—H10B109.5
C6—N2—Ge1144.41 (8)C9—C10—H10C109.5
C9—N3—C11119.83 (9)H10A—C10—H10C109.5
C9—N3—Ge1127.60 (8)H10B—C10—H10C109.5
C11—N3—Ge1112.27 (7)N3—C11—C13112.79 (10)
N2—C1—N1109.59 (10)N3—C11—C12114.00 (10)
N2—C1—C2127.14 (11)C13—C11—C12112.00 (10)
N1—C1—C2123.27 (10)N3—C11—H11105.7
N2—C1—Ge159.23 (6)C13—C11—H11105.7
N1—C1—Ge150.41 (5)C12—C11—H11105.7
C2—C1—Ge1173.51 (9)C11—C12—H12A109.5
C1—C2—H2A109.5C11—C12—H12B109.5
C1—C2—H2B109.5H12A—C12—H12B109.5
H2A—C2—H2B109.5C11—C12—H12C109.5
C1—C2—H2C109.5H12A—C12—H12C109.5
H2A—C2—H2C109.5H12B—C12—H12C109.5
H2B—C2—H2C109.5C11—C13—H13A109.5
C1—C2—H2D109.5C11—C13—H13B109.5
H2A—C2—H2D141.1H13A—C13—H13B109.5
H2B—C2—H2D56.3C11—C13—H13C109.5
H2C—C2—H2D56.3H13A—C13—H13C109.5
C1—C2—H2E109.5H13B—C13—H13C109.5
H2A—C2—H2E56.3C9—N4—C14123.7 (9)
H2B—C2—H2E141.1N4—C14—C16108.3 (7)
H2C—C2—H2E56.3N4—C14—C15108.6 (6)
H2D—C2—H2E109.5C16—C14—C15111.9 (6)
C1—C2—H2F109.5N4—C14—H14109.3
H2A—C2—H2F56.3C16—C14—H14109.3
H2B—C2—H2F56.3C15—C14—H14109.3
H2C—C2—H2F141.1C14—C15—H15A109.5
H2D—C2—H2F109.5C14—C15—H15B109.5
H2E—C2—H2F109.5H15A—C15—H15B109.5
N1—C3—C4111.39 (10)C14—C15—H15C109.5
N1—C3—C5110.94 (10)H15A—C15—H15C109.5
C4—C3—C5111.01 (11)H15B—C15—H15C109.5
N1—C3—H3107.8C14—C16—H16A109.5
C4—C3—H3107.8C14—C16—H16B109.5
C5—C3—H3107.8H16A—C16—H16B109.5
C3—C4—H4A109.5C14—C16—H16C109.5
C3—C4—H4B109.5H16A—C16—H16C109.5
H4A—C4—H4B109.5H16B—C16—H16C109.5
C3—C4—H4C109.5C9—N4'—C14'115.9 (10)
H4A—C4—H4C109.5N4'—C14'—C16'107.6 (7)
H4B—C4—H4C109.5N4'—C14'—C15'109.9 (6)
C3—C5—H5A109.5C16'—C14'—C15'110.0 (6)
C3—C5—H5B109.5N4'—C14'—H14'109.8
H5A—C5—H5B109.5C16'—C14'—H14'109.8
C3—C5—H5C109.5C15'—C14'—H14'109.8
H5A—C5—H5C109.5C14'—C15'—H15D109.5
H5B—C5—H5C109.5C14'—C15'—H15E109.5
N2—C6—C7109.03 (11)H15D—C15'—H15E109.5
N2—C6—C8109.80 (12)C14'—C15'—H15F109.5
C7—C6—C8113.02 (15)H15D—C15'—H15F109.5
N2—C6—H6108.3H15E—C15'—H15F109.5
C7—C6—H6108.3C14'—C16'—H16D109.5
C8—C6—H6108.3C14'—C16'—H16E109.5
C6—C7—H7A109.5H16D—C16'—H16E109.5
C6—C7—H7B109.5C14'—C16'—H16F109.5
H7A—C7—H7B109.5H16D—C16'—H16F109.5
C6—C7—H7C109.5H16E—C16'—H16F109.5
O1i—Ge1—O1—Ge1i4.88 (4)C3—N1—C1—Ge1163.67 (13)
N3—Ge1—O1—Ge1i−95.52 (4)O1—Ge1—C1—N258.62 (7)
N1—Ge1—O1—Ge1i100.93 (4)O1i—Ge1—C1—N2161.01 (6)
N2—Ge1—O1—Ge1i161.84 (3)N3—Ge1—C1—N2−76.93 (7)
O1—Ge1—N1—C172.88 (8)N1—Ge1—C1—N2−177.09 (11)
O1i—Ge1—N1—C1162.93 (7)O1—Ge1—C1—N1−124.28 (7)
N3—Ge1—N1—C1−92.00 (7)O1i—Ge1—C1—N1−21.89 (9)
N2—Ge1—N1—C1−1.70 (6)N3—Ge1—C1—N1100.16 (7)
O1—Ge1—N1—C3−88.15 (11)N2—Ge1—C1—N1177.09 (11)
O1i—Ge1—N1—C31.89 (11)C1—N1—C3—C4−89.99 (14)
N3—Ge1—N1—C3106.97 (11)Ge1—N1—C3—C466.67 (14)
N2—Ge1—N1—C3−162.73 (12)C1—N1—C3—C5145.80 (11)
O1—Ge1—N2—C1−127.45 (7)Ge1—N1—C3—C5−57.54 (14)
O1i—Ge1—N2—C1−40.55 (12)C1—N2—C6—C7129.19 (15)
N3—Ge1—N2—C1110.76 (7)Ge1—N2—C6—C7−54.4 (2)
N1—Ge1—N2—C11.75 (7)C1—N2—C6—C8−106.49 (15)
O1—Ge1—N2—C655.45 (15)Ge1—N2—C6—C869.89 (19)
O1i—Ge1—N2—C6142.36 (14)C11—N3—C9—N4'−1.0 (5)
N3—Ge1—N2—C6−66.34 (15)Ge1—N3—C9—N4'−174.2 (5)
N1—Ge1—N2—C6−175.35 (16)C11—N3—C9—N415.5 (5)
O1—Ge1—N3—C9−24.75 (11)Ge1—N3—C9—N4−157.6 (4)
O1i—Ge1—N3—C9−116.23 (10)C11—N3—C9—C10−169.85 (10)
N1—Ge1—N3—C9141.17 (9)Ge1—N3—C9—C1017.01 (15)
N2—Ge1—N3—C974.80 (10)C9—N3—C11—C13−73.08 (14)
O1—Ge1—N3—C11161.68 (7)Ge1—N3—C11—C13101.05 (10)
O1i—Ge1—N3—C1170.20 (8)C9—N3—C11—C1256.10 (15)
N1—Ge1—N3—C11−32.40 (9)Ge1—N3—C11—C12−129.76 (9)
N2—Ge1—N3—C11−98.78 (8)N4'—C9—N4—C14−102 (4)
C6—N2—C1—N1175.52 (11)N3—C9—N4—C14−174.1 (5)
Ge1—N2—C1—N1−2.38 (9)C10—C9—N4—C1411.6 (9)
C6—N2—C1—C2−3.6 (2)C9—N4—C14—C16−148.6 (7)
Ge1—N2—C1—C2178.47 (12)C9—N4—C14—C1589.7 (9)
C6—N2—C1—Ge1177.89 (13)N4—C9—N4'—C14'72 (3)
C3—N1—C1—N2166.32 (10)N3—C9—N4'—C14'−171.9 (5)
Ge1—N1—C1—N22.65 (10)C10—C9—N4'—C14'−4.5 (9)
C3—N1—C1—C2−14.48 (18)C9—N4'—C14'—C16'145.1 (7)
Ge1—N1—C1—C2−178.16 (10)C9—N4'—C14'—C15'−95.1 (9)
  6 in total

1.  An amidinate-stabilized germatrisilacyclobutadiene ylide.

Authors:  Hui-Xian Yeong; Shu-Hua Zhang; Hong-Wei Xi; Jing-Dong Guo; Kok Hwa Lim; Shigeru Nagase; Cheuk-Wai So
Journal:  Chemistry       Date:  2012-01-24       Impact factor: 5.236

2.  A short history of SHELX.

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

3.  Expanding the coordination chemistry of donor-stabilized group-14 metalenes.

Authors:  Javier A Cabeza; Pablo García-Álvarez; Diego Polo
Journal:  Dalton Trans       Date:  2012-11-19       Impact factor: 4.390

4.  Pushing the σ-donor strength in iridium pincer complexes: bis(silylene) and bis(germylene) ligands are stronger donors than bis(phosphorus(III)) ligands.

Authors:  Andreas Brück; Daniel Gallego; Wenyuan Wang; Elisabeth Irran; Matthias Driess; John F Hartwig
Journal:  Angew Chem Int Ed Engl       Date:  2012-10-16       Impact factor: 15.336

5.  Synthesis, characterisation and reactivity of germanium(II) amidinate and guanidinate complexes.

Authors:  Cameron Jones; Richard P Rose; Andreas Stasch
Journal:  Dalton Trans       Date:  2008-04-17       Impact factor: 4.390

6.  Bis(amidinato)germylenerhodium complexes: synthesis, structure, and density functional theory calculations.

Authors:  Dimitri Matioszek; Nathalie Saffon; Jean-Marc Sotiropoulos; Karinne Miqueu; Annie Castel; Jean Escudié
Journal:  Inorg Chem       Date:  2012-10-22       Impact factor: 5.165

  6 in total

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