

Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536811014085/lr2005sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S1600536811014085/lr2005Isup2.hkl |
Key indicators
- Single-crystal X-ray study
- T = 293 K
- Mean
(C-C) = 0.008 Å
- R factor = 0.031
- wR factor = 0.078
- Data-to-parameter ratio = 23.8
checkCIF/PLATON results
No syntax errors found
Alert level C PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 1 PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 251
Alert level G PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature 293 K PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature 293 K PLAT232_ALERT_2_G Hirshfeld Test Diff (M-X) Pt1 -- I1 .. 13.00 su PLAT380_ALERT_4_G Check Incorrectly? Oriented X(sp2)-Methyl Moiety C11
0 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 2 ALERT level C = Check. Ensure it is not caused by an omission or oversight 4 ALERT level G = General information/check it is not something unexpected 2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 1 ALERT type 2 Indicator that the structure model may be wrong or deficient 1 ALERT type 3 Indicator that the structure quality may be low 2 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
The title compound was synthesized by a modified version of the method used by Clegg et al. (1972). 5,5'-dimethyl-2,2'-bipyridine (1.2 mg, 0.006 mmol) and PtIV(CH3)3I (2.0 mg, 0,005 mmol) was weighed out in an NMR-tube, and 0.5 ml of deuterated benzene (C6D6) was added. The resulting mixture was heated to 75 °C for 3 days without stirring. A number of NMR-spectra were recorded during the synthesis to monitor the formation of the complex. After the NMR-experiments were finished, the NMR-tube was left at ambient temperature for 7 days, during which crystals of the complex formed.
H-atoms were positioned geometrically at distances of 0.93(CH) and 0.96Å (CH3) and refined using a riding model with Uiso(H)=1.2 Ueq(C) and Uiso(H)=1.5 Ueq(Cmethyl)
As a part of a larger project, the title compound and several other compounds based on substituted bipyridines and PtIV salts were synthesized in an NMR-screening for new PtIV complexes for potential application in bimetallic MOFs (Metal-Organic Frameworks). Bimetallic MOFs containing bipyridine, Pt(II) (Szeto et al., 2006, 2008) and Pd(II) (Bloch et al., 2010) have previously been reported, but so far no thermally stable bimetallic MOF containing PtIV is reported in the literature.
The title compound has previously been reported (Clegg et al., 1972) as a part of an extensive NMR-studies to find evidence for cis and trans influences in trimethylplatinum(IV) compounds. The NMR spectra of the compound is in good accordance with what was reported, and the crystal structure supports the finds with regards to trans influences.
For synthetic background to related complexes containing Pt(CH3)3, see: Clegg et al. (1972); Vetter et al. (2006). For structural information on complexes exhibiting a similar geometrical configuration around the PtIV atom, see: Hambley (1986); Hojjat Kashani et al. (2008); Vetter, Bruhn & Steinborn (2010); Vetter, Wagner & Steinborn (2010). For examples of bimetallic MOFs, see: Bloch et al. (2010); Szeto et al. (2006, 2008)
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2004); software used to prepare material for publication: publCIF (Westrip, 2010).
[Pt(CH3)3I(C12H12N2)] | F(000) = 1024 |
Mr = 551.32 | Dx = 2.211 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 7297 reflections |
a = 15.354 (3) Å | θ = 2.8–27.6° |
b = 12.394 (2) Å | µ = 10.33 mm−1 |
c = 9.0627 (18) Å | T = 293 K |
β = 106.222 (2)° | Plate, orange |
V = 1655.8 (6) Å3 | 0.4 × 0.4 × 0.1 mm |
Z = 4 |
Bruker APEXII CCD area-detector diffractometer | 4094 independent reflections |
Radiation source: sealed tube | 3477 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.048 |
φ and ω scans | θmax = 29.0°, θmin = 2.2° |
Absorption correction: numerical (SADABS; Bruker, 2005) | h = −19→19 |
Tmin = 0.022, Tmax = 0.356 | k = −16→16 |
18721 measured reflections | l = −11→12 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.031 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.078 | H-atom parameters constrained |
S = 1.01 | w = 1/[σ2(Fo2) + (0.045P)2] where P = (Fo2 + 2Fc2)/3 |
4094 reflections | (Δ/σ)max = 0.001 |
172 parameters | Δρmax = 0.82 e Å−3 |
0 restraints | Δρmin = −2.14 e Å−3 |
[Pt(CH3)3I(C12H12N2)] | V = 1655.8 (6) Å3 |
Mr = 551.32 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 15.354 (3) Å | µ = 10.33 mm−1 |
b = 12.394 (2) Å | T = 293 K |
c = 9.0627 (18) Å | 0.4 × 0.4 × 0.1 mm |
β = 106.222 (2)° |
Bruker APEXII CCD area-detector diffractometer | 4094 independent reflections |
Absorption correction: numerical (SADABS; Bruker, 2005) | 3477 reflections with I > 2σ(I) |
Tmin = 0.022, Tmax = 0.356 | Rint = 0.048 |
18721 measured reflections |
R[F2 > 2σ(F2)] = 0.031 | 0 restraints |
wR(F2) = 0.078 | H-atom parameters constrained |
S = 1.01 | Δρmax = 0.82 e Å−3 |
4094 reflections | Δρmin = −2.14 e Å−3 |
172 parameters |
Experimental. Synthesis of the complex was performed in deuterated solvent. |
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. |
x | y | z | Uiso*/Ueq | ||
Pt1 | 0.208561 (12) | 0.071224 (14) | 0.65323 (2) | 0.03239 (8) | |
I1 | 0.34139 (2) | 0.03855 (3) | 0.50370 (4) | 0.04465 (10) | |
N2 | 0.3088 (3) | 0.0375 (3) | 0.8682 (4) | 0.0354 (9) | |
C1 | 0.1397 (3) | −0.1655 (4) | 0.5835 (6) | 0.0412 (11) | |
H1 | 0.0981 | −0.1344 | 0.4995 | 0.049* | |
C3 | 0.1999 (4) | −0.3208 (4) | 0.7271 (7) | 0.0540 (14) | |
H3 | 0.2019 | −0.3949 | 0.7433 | 0.065* | |
C9 | 0.4219 (4) | 0.0869 (5) | 1.0999 (6) | 0.0459 (13) | |
C8 | 0.4289 (4) | −0.0211 (5) | 1.1424 (6) | 0.0512 (14) | |
H8 | 0.4691 | −0.0412 | 1.2355 | 0.061* | |
C7 | 0.3777 (4) | −0.0985 (5) | 1.0502 (7) | 0.0520 (14) | |
H7 | 0.3831 | −0.1707 | 1.0796 | 0.062* | |
N1 | 0.1984 (3) | −0.1024 (3) | 0.6788 (5) | 0.0369 (9) | |
C13 | 0.1095 (4) | 0.0898 (4) | 0.4489 (6) | 0.0440 (12) | |
H13A | 0.0845 | 0.0206 | 0.4125 | 0.066* | |
H13B | 0.1353 | 0.1220 | 0.3743 | 0.066* | |
H13C | 0.0623 | 0.1356 | 0.4643 | 0.066* | |
C2 | 0.1371 (4) | −0.2776 (4) | 0.6031 (7) | 0.0474 (13) | |
C15 | 0.1083 (4) | 0.0958 (4) | 0.7657 (6) | 0.0451 (12) | |
H15A | 0.1350 | 0.0914 | 0.8748 | 0.068* | |
H15B | 0.0623 | 0.0414 | 0.7342 | 0.068* | |
H15C | 0.0817 | 0.1658 | 0.7397 | 0.068* | |
C4 | 0.2599 (4) | −0.2542 (4) | 0.8277 (6) | 0.0507 (13) | |
H4 | 0.3021 | −0.2835 | 0.9125 | 0.061* | |
C14 | 0.2236 (4) | 0.2350 (4) | 0.6478 (6) | 0.0487 (13) | |
H14A | 0.2700 | 0.2578 | 0.7372 | 0.073* | |
H14B | 0.1673 | 0.2694 | 0.6465 | 0.073* | |
H14C | 0.2404 | 0.2548 | 0.5571 | 0.073* | |
C11 | 0.4762 (4) | 0.1730 (5) | 1.1990 (7) | 0.0587 (16) | |
H11A | 0.5147 | 0.1412 | 1.2907 | 0.088* | |
H11B | 0.4360 | 0.2239 | 1.2259 | 0.088* | |
H11C | 0.5127 | 0.2093 | 1.1441 | 0.088* | |
C12 | 0.0671 (5) | −0.3445 (5) | 0.4897 (8) | 0.0661 (17) | |
H12A | 0.0305 | −0.2984 | 0.4115 | 0.099* | |
H12B | 0.0291 | −0.3806 | 0.5422 | 0.099* | |
H12C | 0.0971 | −0.3970 | 0.4433 | 0.099* | |
C5 | 0.2577 (3) | −0.1439 (4) | 0.8034 (6) | 0.0381 (10) | |
C6 | 0.3172 (3) | −0.0669 (4) | 0.9108 (6) | 0.0358 (10) | |
C10 | 0.3605 (3) | 0.1121 (4) | 0.9595 (5) | 0.0395 (10) | |
H10 | 0.3550 | 0.1837 | 0.9276 | 0.047* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pt1 | 0.02979 (11) | 0.02980 (11) | 0.03496 (12) | −0.00090 (6) | 0.00471 (8) | 0.00234 (6) |
I1 | 0.04027 (19) | 0.0491 (2) | 0.04544 (19) | −0.00213 (15) | 0.01335 (15) | −0.00193 (15) |
N2 | 0.035 (2) | 0.036 (2) | 0.034 (2) | 0.0054 (17) | 0.0069 (17) | 0.0060 (16) |
C1 | 0.043 (3) | 0.035 (3) | 0.048 (3) | 0.000 (2) | 0.018 (2) | −0.001 (2) |
C3 | 0.063 (4) | 0.032 (3) | 0.072 (4) | 0.002 (3) | 0.027 (3) | 0.006 (3) |
C9 | 0.030 (3) | 0.061 (3) | 0.042 (3) | 0.004 (2) | 0.002 (2) | −0.009 (2) |
C8 | 0.046 (3) | 0.063 (4) | 0.038 (3) | 0.009 (3) | 0.000 (2) | 0.005 (3) |
C7 | 0.051 (3) | 0.049 (3) | 0.052 (3) | 0.014 (3) | 0.008 (3) | 0.015 (3) |
N1 | 0.040 (2) | 0.033 (2) | 0.040 (2) | −0.0036 (18) | 0.0136 (19) | 0.0008 (17) |
C13 | 0.041 (3) | 0.044 (3) | 0.041 (3) | −0.007 (2) | 0.002 (2) | 0.000 (2) |
C2 | 0.052 (3) | 0.031 (2) | 0.068 (4) | −0.005 (2) | 0.031 (3) | −0.007 (2) |
C15 | 0.048 (3) | 0.037 (3) | 0.049 (3) | −0.008 (2) | 0.012 (2) | −0.002 (2) |
C4 | 0.059 (3) | 0.036 (3) | 0.055 (3) | 0.010 (3) | 0.013 (3) | 0.008 (2) |
C14 | 0.053 (3) | 0.030 (3) | 0.057 (3) | −0.003 (2) | 0.006 (3) | 0.002 (2) |
C11 | 0.044 (3) | 0.075 (4) | 0.048 (3) | 0.002 (3) | −0.001 (3) | −0.014 (3) |
C12 | 0.069 (4) | 0.046 (3) | 0.084 (5) | −0.012 (3) | 0.023 (4) | −0.012 (3) |
C5 | 0.043 (3) | 0.034 (2) | 0.041 (2) | 0.004 (2) | 0.018 (2) | 0.003 (2) |
C6 | 0.032 (2) | 0.043 (3) | 0.033 (2) | 0.0062 (19) | 0.009 (2) | 0.0047 (19) |
C10 | 0.036 (3) | 0.042 (3) | 0.037 (2) | 0.000 (2) | 0.006 (2) | −0.003 (2) |
Pt1—C14 | 2.045 (5) | N1—C5 | 1.339 (6) |
Pt1—C13 | 2.055 (5) | C13—H13A | 0.9600 |
Pt1—C15 | 2.092 (5) | C13—H13B | 0.9600 |
Pt1—N2 | 2.160 (4) | C13—H13C | 0.9600 |
Pt1—N1 | 2.175 (4) | C2—C12 | 1.511 (8) |
Pt1—I1 | 2.7755 (5) | C15—H15A | 0.9600 |
N2—C10 | 1.342 (6) | C15—H15B | 0.9600 |
N2—C6 | 1.346 (6) | C15—H15C | 0.9600 |
C1—N1 | 1.317 (6) | C4—C5 | 1.384 (7) |
C1—C2 | 1.402 (7) | C4—H4 | 0.9300 |
C1—H1 | 0.9300 | C14—H14A | 0.9600 |
C3—C2 | 1.369 (8) | C14—H14B | 0.9600 |
C3—C4 | 1.375 (8) | C14—H14C | 0.9600 |
C3—H3 | 0.9300 | C11—H11A | 0.9600 |
C9—C8 | 1.388 (8) | C11—H11B | 0.9600 |
C9—C10 | 1.392 (7) | C11—H11C | 0.9600 |
C9—C11 | 1.490 (8) | C12—H12A | 0.9600 |
C8—C7 | 1.367 (9) | C12—H12B | 0.9600 |
C8—H8 | 0.9300 | C12—H12C | 0.9600 |
C7—C6 | 1.400 (7) | C5—C6 | 1.482 (7) |
C7—H7 | 0.9300 | C10—H10 | 0.9300 |
C14—Pt1—C13 | 85.8 (2) | H13B—C13—H13C | 109.5 |
C14—Pt1—C15 | 88.3 (2) | C3—C2—C1 | 116.9 (5) |
C13—Pt1—C15 | 87.9 (2) | C3—C2—C12 | 123.2 (5) |
C14—Pt1—N2 | 99.02 (19) | C1—C2—C12 | 119.8 (5) |
C13—Pt1—N2 | 175.08 (17) | Pt1—C15—H15A | 109.5 |
C15—Pt1—N2 | 91.41 (19) | Pt1—C15—H15B | 109.5 |
C14—Pt1—N1 | 175.34 (19) | H15A—C15—H15B | 109.5 |
C13—Pt1—N1 | 98.62 (18) | Pt1—C15—H15C | 109.5 |
C15—Pt1—N1 | 90.43 (18) | H15A—C15—H15C | 109.5 |
N2—Pt1—N1 | 76.52 (16) | H15B—C15—H15C | 109.5 |
C14—Pt1—I1 | 91.72 (16) | C3—C4—C5 | 120.3 (5) |
C13—Pt1—I1 | 92.07 (16) | C3—C4—H4 | 119.8 |
C15—Pt1—I1 | 179.94 (17) | C5—C4—H4 | 119.8 |
N2—Pt1—I1 | 88.65 (10) | Pt1—C14—H14A | 109.5 |
N1—Pt1—I1 | 89.55 (11) | Pt1—C14—H14B | 109.5 |
C10—N2—C6 | 119.5 (4) | H14A—C14—H14B | 109.5 |
C10—N2—Pt1 | 124.9 (3) | Pt1—C14—H14C | 109.5 |
C6—N2—Pt1 | 115.6 (3) | H14A—C14—H14C | 109.5 |
N1—C1—C2 | 122.9 (5) | H14B—C14—H14C | 109.5 |
N1—C1—H1 | 118.5 | C9—C11—H11A | 109.5 |
C2—C1—H1 | 118.5 | C9—C11—H11B | 109.5 |
C2—C3—C4 | 119.8 (5) | H11A—C11—H11B | 109.5 |
C2—C3—H3 | 120.1 | C9—C11—H11C | 109.5 |
C4—C3—H3 | 120.1 | H11A—C11—H11C | 109.5 |
C8—C9—C10 | 116.7 (5) | H11B—C11—H11C | 109.5 |
C8—C9—C11 | 122.5 (5) | C2—C12—H12A | 109.5 |
C10—C9—C11 | 120.8 (5) | C2—C12—H12B | 109.5 |
C7—C8—C9 | 121.4 (5) | H12A—C12—H12B | 109.5 |
C7—C8—H8 | 119.3 | C2—C12—H12C | 109.5 |
C9—C8—H8 | 119.3 | H12A—C12—H12C | 109.5 |
C8—C7—C6 | 118.6 (5) | H12B—C12—H12C | 109.5 |
C8—C7—H7 | 120.7 | N1—C5—C4 | 119.6 (5) |
C6—C7—H7 | 120.7 | N1—C5—C6 | 117.1 (4) |
C1—N1—C5 | 120.3 (4) | C4—C5—C6 | 123.3 (5) |
C1—N1—Pt1 | 125.0 (3) | N2—C6—C7 | 121.0 (5) |
C5—N1—Pt1 | 114.7 (3) | N2—C6—C5 | 116.0 (4) |
Pt1—C13—H13A | 109.5 | C7—C6—C5 | 123.0 (5) |
Pt1—C13—H13B | 109.5 | N2—C10—C9 | 122.8 (5) |
H13A—C13—H13B | 109.5 | N2—C10—H10 | 118.6 |
Pt1—C13—H13C | 109.5 | C9—C10—H10 | 118.6 |
H13A—C13—H13C | 109.5 | ||
C14—Pt1—N2—C10 | 0.3 (4) | N1—C1—C2—C3 | −0.7 (8) |
C15—Pt1—N2—C10 | −88.2 (4) | N1—C1—C2—C12 | 179.4 (5) |
N1—Pt1—N2—C10 | −178.3 (4) | C2—C3—C4—C5 | −0.7 (8) |
I1—Pt1—N2—C10 | 91.9 (4) | C1—N1—C5—C4 | 3.0 (7) |
C14—Pt1—N2—C6 | 179.4 (3) | Pt1—N1—C5—C4 | −177.3 (4) |
C15—Pt1—N2—C6 | 90.9 (3) | C1—N1—C5—C6 | −175.8 (4) |
N1—Pt1—N2—C6 | 0.8 (3) | Pt1—N1—C5—C6 | 3.9 (5) |
I1—Pt1—N2—C6 | −89.1 (3) | C3—C4—C5—N1 | −1.8 (8) |
C10—C9—C8—C7 | 0.1 (8) | C3—C4—C5—C6 | 177.0 (5) |
C11—C9—C8—C7 | 179.4 (6) | C10—N2—C6—C7 | 1.3 (7) |
C9—C8—C7—C6 | −0.2 (9) | Pt1—N2—C6—C7 | −177.9 (4) |
C2—C1—N1—C5 | −1.8 (8) | C10—N2—C6—C5 | −180.0 (4) |
C2—C1—N1—Pt1 | 178.6 (4) | Pt1—N2—C6—C5 | 0.9 (5) |
C13—Pt1—N1—C1 | −2.1 (4) | C8—C7—C6—N2 | −0.4 (8) |
C15—Pt1—N1—C1 | 85.8 (4) | C8—C7—C6—C5 | −179.1 (5) |
N2—Pt1—N1—C1 | 177.1 (4) | N1—C5—C6—N2 | −3.2 (6) |
I1—Pt1—N1—C1 | −94.1 (4) | C4—C5—C6—N2 | 178.0 (5) |
C13—Pt1—N1—C5 | 178.2 (4) | N1—C5—C6—C7 | 175.5 (5) |
C15—Pt1—N1—C5 | −93.9 (4) | C4—C5—C6—C7 | −3.3 (8) |
N2—Pt1—N1—C5 | −2.5 (3) | C6—N2—C10—C9 | −1.4 (7) |
I1—Pt1—N1—C5 | 86.2 (3) | Pt1—N2—C10—C9 | 177.6 (4) |
C4—C3—C2—C1 | 1.9 (8) | C8—C9—C10—N2 | 0.8 (8) |
C4—C3—C2—C12 | −178.2 (5) | C11—C9—C10—N2 | −178.5 (5) |
Experimental details
Crystal data | |
Chemical formula | [Pt(CH3)3I(C12H12N2)] |
Mr | 551.32 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 15.354 (3), 12.394 (2), 9.0627 (18) |
β (°) | 106.222 (2) |
V (Å3) | 1655.8 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 10.33 |
Crystal size (mm) | 0.4 × 0.4 × 0.1 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector |
Absorption correction | Numerical (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.022, 0.356 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 18721, 4094, 3477 |
Rint | 0.048 |
(sin θ/λ)max (Å−1) | 0.681 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.078, 1.01 |
No. of reflections | 4094 |
No. of parameters | 172 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.82, −2.14 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SIR92 (Altomare et al., 1993), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg, 2004), publCIF (Westrip, 2010).
Pt1—C14 | 2.045 (5) | Pt1—N2 | 2.160 (4) |
Pt1—C13 | 2.055 (5) | Pt1—N1 | 2.175 (4) |
Pt1—C15 | 2.092 (5) | Pt1—I1 | 2.7755 (5) |
C14—Pt1—C13 | 85.8 (2) | N2—Pt1—N1 | 76.52 (16) |
C13—Pt1—N1 | 98.62 (18) | C15—Pt1—I1 | 179.94 (17) |
C15—Pt1—N1 | 90.43 (18) |
As a part of a larger project, the title compound and several other compounds based on substituted bipyridines and PtIV salts were synthesized in an NMR-screening for new PtIV complexes for potential application in bimetallic MOFs (Metal-Organic Frameworks). Bimetallic MOFs containing bipyridine, Pt(II) (Szeto et al., 2006, 2008) and Pd(II) (Bloch et al., 2010) have previously been reported, but so far no thermally stable bimetallic MOF containing PtIV is reported in the literature.
The title compound has previously been reported (Clegg et al., 1972) as a part of an extensive NMR-studies to find evidence for cis and trans influences in trimethylplatinum(IV) compounds. The NMR spectra of the compound is in good accordance with what was reported, and the crystal structure supports the finds with regards to trans influences.