The title compound [Ag4I4(C21H21P)4], crystallizes on a centre of symmetry. Each Ag atom is surrounded by one phosphine ligand and three iodide anions, forming a distorted tetrahedral configuration. The Ag—P distance is 2.4666 (7) Å and the Ag—I distances are 2.7972 (6), 2.8322 (10) and 3.1956 (6) Å.
Supporting information
CCDC reference: 621526
Key indicators
- Single-crystal X-ray study
- T = 273 K
- Mean (C-C) = 0.003 Å
- R factor = 0.017
- wR factor = 0.067
- Data-to-parameter ratio = 22.5
checkCIF/PLATON results
No syntax errors found
Alert level A
PLAT232_ALERT_2_A Hirshfeld Test Diff (M-X) I - Ag_b .. 123.92 su
| Author Response: Atoms generated by symmetry. 'Non-bonding' Ag-I interaction; larger
thermal motion perpendicular of formal Ag-I bond.
|
Alert level B
PLAT232_ALERT_2_B Hirshfeld Test Diff (M-X) I - Ag .. 18.04 su
| Author Response: Atoms generated by symmetry. 'Non-bonding' Ag-I interaction; larger
thermal motion perpendicular of formal Ag-I bond.
|
PLAT232_ALERT_2_B Hirshfeld Test Diff (M-X) I - Ag_c .. 38.71 su
| Author Response: Atoms generated by symmetry. 'Non-bonding' Ag-I interaction; larger
thermal motion perpendicular of formal Ag-I bond.
|
Alert level C
PLAT220_ALERT_2_C Large Non-Solvent C Ueq(max)/Ueq(min) ... 2.53 Ratio
PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd. # 1
C84 H84 Ag4 I4 P4
1 ALERT level A = In general: serious problem
2 ALERT level B = Potentially serious problem
2 ALERT level C = Check and explain
0 ALERT level G = General alerts; check
0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
4 ALERT type 2 Indicator that the structure model may be wrong or deficient
0 ALERT type 3 Indicator that the structure quality may be low
1 ALERT type 4 Improvement, methodology, query or suggestion
0 ALERT type 5 Informative message, check
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT-Plus (Bruker, 2004); data reduction: SAINT-Plus and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: WinGX (Farrugia, 1999).
Tetra-µ
3-iodo-tetrakis[(tri-
p-tolylphosphine-
κP)silver(I)]
top
Crystal data top
[Ag4I4(C21H21P)4] | Dx = 1.799 Mg m−3 |
Mr = 2156.47 | Mo Kα radiation, λ = 0.71069 Å |
Tetragonal, I41/a | Cell parameters from 8229 reflections |
Hall symbol: -I 4ad | θ = 2.4–28.3° |
a = 23.986 (5) Å | µ = 2.64 mm−1 |
c = 13.842 (5) Å | T = 273 K |
V = 7964 (4) Å3 | Block, colourless |
Z = 4 | 0.39 × 0.17 × 0.16 mm |
F(000) = 4192 | |
Data collection top
Bruker X8 APEX-II 4K Kappa CCD diffractometer | 4955 independent reflections |
Radiation source: fine-focus sealed tube | 4724 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.02 |
Detector resolution: 512 pixels mm-1 | θmax = 28.3°, θmin = 1.7° |
ω and φ scans | h = −31→31 |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | k = −32→31 |
Tmin = 0.413, Tmax = 0.657 | l = −18→16 |
35598 measured reflections | |
Refinement top
Refinement on F2 | 0 restraints |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.017 | w = 1/[σ2(Fo2) + (0.0352P)2 + 4.0222P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.067 | (Δ/σ)max = 0.01 |
S = 1.42 | Δρmax = 0.82 e Å−3 |
4955 reflections | Δρmin = −1.56 e Å−3 |
220 parameters | |
Special details top
Experimental. The intensity data were collected on a Bruker X8 Apex II diffractometer using an
exposure time of XX s/frame. A total of XXXX frames were collected with a
frame width of 0.5° covering up to θ = 28.30° with 99.9% completeness
accomplished. |
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
Ag | 1.041727 (6) | 0.189572 (7) | 1.058184 (11) | 0.01964 (6) | |
I | 0.931721 (5) | 0.185681 (5) | 0.991452 (9) | 0.01558 (5) | |
P | 1.11879 (2) | 0.14902 (2) | 0.96340 (4) | 0.01339 (10) | |
C11 | 1.10295 (8) | 0.13994 (8) | 0.83576 (14) | 0.0157 (4) | |
C12 | 1.05863 (9) | 0.17008 (9) | 0.79663 (16) | 0.0204 (4) | |
H12 | 1.0388 | 0.1949 | 0.8352 | 0.024* | |
C13 | 1.04393 (9) | 0.16325 (10) | 0.70026 (16) | 0.0237 (4) | |
H13 | 1.0146 | 0.184 | 0.675 | 0.028* | |
C14 | 1.07213 (9) | 0.12600 (10) | 0.64068 (16) | 0.0228 (4) | |
C15 | 1.11640 (10) | 0.09597 (10) | 0.68040 (16) | 0.0237 (4) | |
H15 | 1.1359 | 0.0708 | 0.6419 | 0.028* | |
C16 | 1.13189 (9) | 0.10293 (9) | 0.77617 (15) | 0.0205 (4) | |
H16 | 1.1618 | 0.0828 | 0.8009 | 0.025* | |
C17 | 1.05526 (11) | 0.11871 (13) | 0.53659 (17) | 0.0330 (6) | |
H17A | 1.0155 | 0.1216 | 0.5312 | 0.05* | |
H17B | 1.0671 | 0.0827 | 0.5142 | 0.05* | |
H17C | 1.0725 | 0.1472 | 0.498 | 0.05* | |
C21 | 1.14707 (8) | 0.08158 (8) | 0.99904 (14) | 0.0149 (4) | |
C22 | 1.11183 (9) | 0.03516 (9) | 0.99495 (17) | 0.0223 (4) | |
H22 | 1.0754 | 0.0394 | 0.9732 | 0.027* | |
C23 | 1.13052 (10) | −0.01705 (9) | 1.02297 (18) | 0.0243 (4) | |
H23 | 1.1065 | −0.0474 | 1.0192 | 0.029* | |
C24 | 1.18460 (10) | −0.02468 (9) | 1.05664 (16) | 0.0223 (4) | |
C25 | 1.21929 (9) | 0.02162 (9) | 1.06139 (17) | 0.0229 (4) | |
H25 | 1.2554 | 0.0174 | 1.0846 | 0.027* | |
C26 | 1.20131 (9) | 0.07412 (9) | 1.03236 (16) | 0.0193 (4) | |
H26 | 1.2256 | 0.1043 | 1.0352 | 0.023* | |
C27 | 1.20491 (11) | −0.08169 (10) | 1.0858 (2) | 0.0377 (6) | |
H27A | 1.1751 | −0.1018 | 1.1163 | 0.057* | |
H27B | 1.2354 | −0.0779 | 1.1303 | 0.057* | |
H27C | 1.2171 | −0.1016 | 1.0296 | 0.057* | |
C31 | 1.17815 (8) | 0.19582 (8) | 0.96874 (15) | 0.0151 (4) | |
C32 | 1.20579 (8) | 0.21559 (9) | 0.88799 (15) | 0.0187 (4) | |
H32 | 1.1953 | 0.2034 | 0.8269 | 0.022* | |
C33 | 1.24939 (9) | 0.25379 (9) | 0.89777 (17) | 0.0213 (4) | |
H33 | 1.2672 | 0.2672 | 0.8428 | 0.026* | |
C34 | 1.26661 (9) | 0.27207 (9) | 0.98781 (16) | 0.0194 (4) | |
C35 | 1.23847 (9) | 0.25194 (9) | 1.06884 (16) | 0.0222 (4) | |
H35 | 1.2495 | 0.2634 | 1.1301 | 0.027* | |
C36 | 1.19432 (9) | 0.21512 (9) | 1.05953 (15) | 0.0203 (4) | |
H36 | 1.1753 | 0.2032 | 1.1143 | 0.024* | |
C37 | 1.31423 (10) | 0.31223 (10) | 0.99910 (18) | 0.0272 (5) | |
H37A | 1.332 | 0.3177 | 0.9377 | 0.041* | |
H37B | 1.3407 | 0.2974 | 1.0442 | 0.041* | |
H37C | 1.3004 | 0.3472 | 1.0226 | 0.041* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Ag | 0.01583 (8) | 0.02634 (9) | 0.01675 (10) | 0.00126 (5) | 0.00073 (5) | −0.00403 (5) |
I | 0.01614 (8) | 0.01644 (7) | 0.01415 (8) | −0.00071 (4) | −0.00205 (4) | −0.00081 (4) |
P | 0.0138 (2) | 0.0143 (2) | 0.0120 (2) | −0.00023 (16) | −0.00039 (17) | −0.00016 (17) |
C11 | 0.0159 (8) | 0.0172 (9) | 0.0141 (9) | −0.0032 (7) | −0.0002 (7) | 0.0008 (7) |
C12 | 0.0190 (9) | 0.0254 (10) | 0.0168 (10) | 0.0006 (8) | 0.0008 (7) | 0.0032 (8) |
C13 | 0.0170 (10) | 0.0339 (12) | 0.0201 (11) | −0.0019 (8) | −0.0036 (8) | 0.0065 (9) |
C14 | 0.0224 (10) | 0.0313 (11) | 0.0146 (10) | −0.0124 (8) | −0.0022 (8) | 0.0015 (8) |
C15 | 0.0287 (11) | 0.0260 (11) | 0.0163 (10) | −0.0033 (8) | 0.0016 (8) | −0.0048 (8) |
C16 | 0.0222 (10) | 0.0223 (10) | 0.0170 (10) | 0.0002 (8) | −0.0016 (8) | −0.0017 (8) |
C17 | 0.0327 (13) | 0.0490 (15) | 0.0174 (11) | −0.0157 (11) | −0.0056 (9) | 0.0007 (10) |
C21 | 0.0170 (9) | 0.0152 (9) | 0.0124 (9) | 0.0000 (7) | 0.0000 (7) | 0.0001 (7) |
C22 | 0.0166 (9) | 0.0210 (10) | 0.0292 (12) | −0.0024 (8) | −0.0025 (8) | 0.0038 (8) |
C23 | 0.0246 (11) | 0.0168 (10) | 0.0315 (12) | −0.0043 (8) | 0.0016 (9) | 0.0018 (8) |
C24 | 0.0252 (10) | 0.0165 (9) | 0.0252 (11) | 0.0026 (8) | 0.0028 (8) | 0.0020 (8) |
C25 | 0.0198 (10) | 0.0214 (10) | 0.0275 (11) | 0.0024 (8) | −0.0044 (8) | 0.0028 (8) |
C26 | 0.0172 (9) | 0.0178 (9) | 0.0230 (10) | −0.0021 (7) | −0.0033 (8) | 0.0005 (8) |
C27 | 0.0310 (13) | 0.0197 (11) | 0.0624 (19) | 0.0040 (9) | 0.0031 (12) | 0.0108 (11) |
C31 | 0.0140 (8) | 0.0138 (8) | 0.0173 (9) | 0.0005 (6) | −0.0009 (7) | 0.0003 (7) |
C32 | 0.0184 (9) | 0.0228 (9) | 0.0150 (9) | −0.0019 (7) | −0.0011 (7) | 0.0019 (7) |
C33 | 0.0196 (10) | 0.0238 (10) | 0.0203 (10) | −0.0036 (8) | 0.0037 (8) | 0.0052 (8) |
C34 | 0.0162 (9) | 0.0154 (9) | 0.0267 (11) | −0.0005 (7) | −0.0009 (8) | 0.0023 (8) |
C35 | 0.0237 (10) | 0.0224 (10) | 0.0204 (11) | −0.0048 (8) | −0.0020 (8) | −0.0025 (8) |
C36 | 0.0239 (10) | 0.0213 (10) | 0.0156 (10) | −0.0050 (8) | 0.0015 (8) | −0.0003 (7) |
C37 | 0.0210 (11) | 0.0242 (11) | 0.0364 (13) | −0.0075 (8) | −0.0012 (9) | 0.0010 (9) |
Geometric parameters (Å, º) top
Ag—P | 2.4666 (7) | C22—C23 | 1.385 (3) |
Ag—I | 2.7972 (6) | C22—H22 | 0.93 |
Ag—Ii | 2.8322 (10) | C23—C24 | 1.390 (3) |
Ag—Agi | 3.1027 (6) | C23—H23 | 0.93 |
Ag—Agii | 3.1027 (6) | C24—C25 | 1.389 (3) |
Ag—Iiii | 3.1956 (6) | C24—C27 | 1.507 (3) |
I—Agii | 2.8322 (10) | C25—C26 | 1.390 (3) |
I—Agiii | 3.1956 (7) | C25—H25 | 0.93 |
P—C31 | 1.815 (2) | C26—H26 | 0.93 |
P—C11 | 1.820 (2) | C27—H27A | 0.96 |
P—C21 | 1.822 (2) | C27—H27B | 0.96 |
C11—C12 | 1.395 (3) | C27—H27C | 0.96 |
C11—C16 | 1.396 (3) | C31—C32 | 1.383 (3) |
C12—C13 | 1.389 (3) | C31—C36 | 1.394 (3) |
C12—H12 | 0.93 | C32—C33 | 1.397 (3) |
C13—C14 | 1.391 (3) | C32—H32 | 0.93 |
C13—H13 | 0.93 | C33—C34 | 1.384 (3) |
C14—C15 | 1.396 (3) | C33—H33 | 0.93 |
C14—C17 | 1.507 (3) | C34—C35 | 1.395 (3) |
C15—C16 | 1.387 (3) | C34—C37 | 1.502 (3) |
C15—H15 | 0.93 | C35—C36 | 1.385 (3) |
C16—H16 | 0.93 | C35—H35 | 0.93 |
C17—H17A | 0.96 | C36—H36 | 0.93 |
C17—H17B | 0.96 | C37—H37A | 0.96 |
C17—H17C | 0.96 | C37—H37B | 0.96 |
C21—C26 | 1.392 (3) | C37—H37C | 0.96 |
C21—C22 | 1.399 (3) | | |
| | | |
P—Ag—I | 121.20 (2) | C26—C21—C22 | 118.40 (19) |
P—Ag—Ii | 110.57 (2) | C26—C21—P | 123.51 (15) |
I—Ag—Ii | 120.109 (7) | C22—C21—P | 118.07 (16) |
P—Ag—Agi | 121.347 (16) | C23—C22—C21 | 120.8 (2) |
I—Ag—Agi | 111.076 (8) | C23—C22—H22 | 119.6 |
Ii—Ag—Agi | 56.016 (13) | C21—C22—H22 | 119.6 |
P—Ag—Agii | 165.000 (14) | C22—C23—C24 | 121.0 (2) |
I—Ag—Agii | 57.094 (19) | C22—C23—H23 | 119.5 |
Ii—Ag—Agii | 64.970 (17) | C24—C23—H23 | 119.5 |
Agi—Ag—Agii | 69.181 (13) | C25—C24—C23 | 118.01 (19) |
P—Ag—Iiii | 93.793 (15) | C25—C24—C27 | 121.3 (2) |
I—Ag—Iiii | 97.111 (8) | C23—C24—C27 | 120.7 (2) |
Ii—Ag—Iiii | 107.889 (8) | C24—C25—C26 | 121.6 (2) |
Agi—Ag—Iiii | 53.420 (18) | C24—C25—H25 | 119.2 |
Agii—Ag—Iiii | 101.206 (8) | C26—C25—H25 | 119.2 |
Ag—I—Agii | 66.891 (8) | C25—C26—C21 | 120.16 (19) |
Ag—I—Agiii | 71.658 (7) | C25—C26—H26 | 119.9 |
Agii—I—Agiii | 61.610 (6) | C21—C26—H26 | 119.9 |
C31—P—C11 | 106.10 (9) | C24—C27—H27A | 109.5 |
C31—P—C21 | 104.24 (9) | C24—C27—H27B | 109.5 |
C11—P—C21 | 103.55 (9) | H27A—C27—H27B | 109.5 |
C31—P—Ag | 108.81 (7) | C24—C27—H27C | 109.5 |
C11—P—Ag | 114.03 (7) | H27A—C27—H27C | 109.5 |
C21—P—Ag | 119.02 (7) | H27B—C27—H27C | 109.5 |
C12—C11—C16 | 118.62 (19) | C32—C31—C36 | 118.77 (19) |
C12—C11—P | 118.28 (16) | C32—C31—P | 123.72 (16) |
C16—C11—P | 123.07 (16) | C36—C31—P | 117.41 (15) |
C13—C12—C11 | 120.3 (2) | C31—C32—C33 | 120.3 (2) |
C13—C12—H12 | 119.8 | C31—C32—H32 | 119.8 |
C11—C12—H12 | 119.8 | C33—C32—H32 | 119.8 |
C12—C13—C14 | 121.4 (2) | C34—C33—C32 | 121.2 (2) |
C12—C13—H13 | 119.3 | C34—C33—H33 | 119.4 |
C14—C13—H13 | 119.3 | C32—C33—H33 | 119.4 |
C13—C14—C15 | 117.9 (2) | C33—C34—C35 | 118.02 (19) |
C13—C14—C17 | 120.7 (2) | C33—C34—C37 | 121.6 (2) |
C15—C14—C17 | 121.4 (2) | C35—C34—C37 | 120.4 (2) |
C16—C15—C14 | 121.2 (2) | C36—C35—C34 | 121.1 (2) |
C16—C15—H15 | 119.4 | C36—C35—H35 | 119.5 |
C14—C15—H15 | 119.4 | C34—C35—H35 | 119.5 |
C15—C16—C11 | 120.5 (2) | C35—C36—C31 | 120.5 (2) |
C15—C16—H16 | 119.7 | C35—C36—H36 | 119.7 |
C11—C16—H16 | 119.7 | C31—C36—H36 | 119.7 |
C14—C17—H17A | 109.5 | C34—C37—H37A | 109.5 |
C14—C17—H17B | 109.5 | C34—C37—H37B | 109.5 |
H17A—C17—H17B | 109.5 | H37A—C37—H37B | 109.5 |
C14—C17—H17C | 109.5 | C34—C37—H37C | 109.5 |
H17A—C17—H17C | 109.5 | H37A—C37—H37C | 109.5 |
H17B—C17—H17C | 109.5 | H37B—C37—H37C | 109.5 |
| | | |
P—Ag—I—Agii | 162.395 (17) | C17—C14—C15—C16 | 179.8 (2) |
Ii—Ag—I—Agii | 16.704 (9) | C14—C15—C16—C11 | 0.7 (3) |
Agi—Ag—I—Agii | −45.327 (9) | C12—C11—C16—C15 | −0.7 (3) |
Iiii—Ag—I—Agii | −98.775 (13) | P—C11—C16—C15 | 177.17 (17) |
P—Ag—I—Agiii | −131.380 (16) | C31—P—C21—C26 | 6.5 (2) |
Ii—Ag—I—Agiii | 82.930 (9) | C11—P—C21—C26 | 117.31 (18) |
Agi—Ag—I—Agiii | 20.899 (10) | Ag—P—C21—C26 | −114.91 (17) |
Agii—Ag—I—Agiii | 66.23 (1) | C31—P—C21—C22 | −175.21 (17) |
Iiii—Ag—I—Agiii | −32.550 (13) | C11—P—C21—C22 | −64.39 (18) |
I—Ag—P—C31 | 138.59 (7) | Ag—P—C21—C22 | 63.39 (18) |
Ii—Ag—P—C31 | −72.80 (7) | C26—C21—C22—C23 | −0.3 (3) |
Agi—Ag—P—C31 | −10.86 (7) | P—C21—C22—C23 | −178.68 (18) |
Agii—Ag—P—C31 | −142.57 (8) | C21—C22—C23—C24 | 0.5 (4) |
Iiii—Ag—P—C31 | 37.92 (7) | C22—C23—C24—C25 | 0.0 (4) |
I—Ag—P—C11 | 20.39 (7) | C22—C23—C24—C27 | −179.2 (2) |
Ii—Ag—P—C11 | 169.01 (7) | C23—C24—C25—C26 | −0.9 (3) |
Agi—Ag—P—C11 | −129.06 (7) | C27—C24—C25—C26 | 178.4 (2) |
Agii—Ag—P—C11 | 99.23 (9) | C24—C25—C26—C21 | 1.1 (3) |
Iiii—Ag—P—C11 | −80.28 (7) | C22—C21—C26—C25 | −0.5 (3) |
I—Ag—P—C21 | −102.33 (8) | P—C21—C26—C25 | 177.77 (17) |
Ii—Ag—P—C21 | 46.28 (8) | C11—P—C31—C32 | −4.0 (2) |
Agi—Ag—P—C21 | 108.21 (8) | C21—P—C31—C32 | 104.96 (18) |
Agii—Ag—P—C21 | −23.50 (10) | Ag—P—C31—C32 | −127.09 (16) |
Iiii—Ag—P—C21 | 156.99 (7) | C11—P—C31—C36 | 172.18 (16) |
C31—P—C11—C12 | −101.02 (17) | C21—P—C31—C36 | −78.87 (17) |
C21—P—C11—C12 | 149.53 (16) | Ag—P—C31—C36 | 49.09 (17) |
Ag—P—C11—C12 | 18.71 (18) | C36—C31—C32—C33 | 0.6 (3) |
C31—P—C11—C16 | 81.14 (19) | P—C31—C32—C33 | 176.69 (16) |
C21—P—C11—C16 | −28.30 (19) | C31—C32—C33—C34 | 1.1 (3) |
Ag—P—C11—C16 | −159.12 (15) | C32—C33—C34—C35 | −1.1 (3) |
C16—C11—C12—C13 | −0.1 (3) | C32—C33—C34—C37 | 178.7 (2) |
P—C11—C12—C13 | −178.06 (17) | C33—C34—C35—C36 | −0.5 (3) |
C11—C12—C13—C14 | 0.9 (3) | C37—C34—C35—C36 | 179.7 (2) |
C12—C13—C14—C15 | −0.8 (3) | C34—C35—C36—C31 | 2.2 (3) |
C12—C13—C14—C17 | 179.4 (2) | C32—C31—C36—C35 | −2.2 (3) |
C13—C14—C15—C16 | 0.0 (3) | P—C31—C36—C35 | −178.53 (17) |
Symmetry codes: (i) −y+5/4, x−3/4, −z+9/4; (ii) y+3/4, −x+5/4, −z+9/4; (iii) −x+2, −y+1/2, z. |
Comparative geometrical data (Å, °) for compounds of the general formula
[AgI{PR3}]4 topComplex | Ag—P | Ag—X | P—Ag—X | X—Ag—X | Ag—X—Ag | Ref |
(I) | 2.4666 (7) | 2.941 (1) | 108.52 (1) | 108.36 (1) | 66.71 (1) | TW |
(II) | 2.438 (2) | 2.918 (1) | 109.9 (1) | 109.0 (9) | 66.7 (4) | a |
(III) | 2.43 (1) | 2.90 (3) | 114 (3) | 104.0 (1) | 73.8 (1) | b |
(IV) | 2.458 (3) | 2.91 (8) | 114 (6) | 104 (6) | 73 (5) | c |
(V) | 2.45 (2) | 2.93 (9) | 116 (1) | 102 (7) | 76 (5) | d |
Notes: all values are average values; TW: this work; (II) [AgI(PEt3)]4;
(III) [AgI(PPh2Bu)]4; (IV) [AgI(PPh3)]4; (V) [AgI(PCy3)]4.
References: (a) Churchill & DeBoer (1975); (b) Bowen et al.
(1994);
(c) Teo & Calabrese (1976b); (d) Bowmaker et al. (1996). |